100,000

100,000 (one hundred thousand) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 105.

Terms for 100,000

In Bangladesh, India, Pakistan and South Asia, one hundred thousand is called a lakh, and is written as 1,00,000. The Thai, Lao, Khmer and Vietnamese languages also have separate words for this number: , , (all saen), and respectively. The Malagasy word is .

In the Netherlands, a 'ton' is a colloquialism for a denomination of 100.000 monetary units. In the guilders period a ton would denote 100.000 guilders. With the introduction of the euro, a ton would come to mean 100.000 euros. Usage is mostly limited to the financial sphere and to the buying and selling of houses. It is not used in official settings because of the ambiguity with the commonly used metric tonne. While usage is common in the Netherlands, it sees almost no use in Belgium.

In Cyrillic numerals, it is known as the legion (): 30px or 25px.

Values of 100,000

In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.

In paleoclimatology, the 100,000-year problem is a mismatch between the temperature record and the modeled incoming solar radiation.

In the Irish language, () is a popular greeting meaning "a hundred thousand welcomes".

Selected 6-digit numbers (100,001–999,999)

100,001 to 199,999

100,001 = second smallest 6-digit number
100,003 = smallest 6-digit prime number
100,128 = smallest triangular number with 6 digits and the 447th triangular number
100,151 = twin prime with 100,153
100,153 = twin prime with 100,151
100,255 = Friedman number
100,489 = 3172, the smallest 6-digit square
101,101 = smallest palindromic Carmichael number
101,723 = smallest prime number whose square is a pandigital number containing each digit from 0 to 9
102,564 = The smallest parasitic number
103,049 = Schröder–Hipparchus number
103,680 = highly totient number
103,769 = the number of combinatorial types of 5-dimensional parallelohedra
103,823 = 473, the smallest 6-digit cube and nice Friedman number (−1 + 0 + 3×8×2)3
104,480 = number of non-isomorphic set-systems of weight 14.
104,723 = the 9,999th prime number
104,729 = the 10,000th prime number
104,869 = the smallest prime number containing every non-prime digit
104,976 = 184, 3-smooth number
105,071 = number of triangle-free graphs on 11 vertices
105,558 = number of partitions of 46
105,664 = harmonic divisor number
108,968 = number of signed trees with 11 nodes
109,376 = automorphic number
110,880 = 30th highly composite number
111,111 = repunit
111,777 = smallest natural number requiring 17 syllables in American English, 19 in British English
113,634 = Motzkin number for n = 14
114,243/80,782 ≈ √2
114,689 = prime factor of F12
115,975 = Bell number
116,281 = 3412, square number, centered decagonal number, 18-gonal number
117,067 = first vampire prime
117,649 = 76
117,800 = harmonic divisor number
120,284 = Keith number
120,960 = highly totient number
123,717 = smallest digitally balanced number in base 7
123,867 = number of trees with 18 unlabeled nodes
124,754 = number of partitions of 47
127,777 = smallest natural number requiring 18 syllables in American English, 20 in British English
127,912 = Wedderburn–Etherington number
128,981 = Starts the first prime gap sequence of 2, 4, 6, 8, 10, 12, 14
129,106 = Keith number
131,072 = 217, largest determinant of a (real) {0,1}-matrix of order 15.
131,361 = Leyland number
134,340 = Pluto's minor planet designation
135,135 = double factorial of 13
135,137 = Markov number
142,129 = 3772, square number, dodecagonal number
142,857 = Kaprekar number, smallest cyclic number in decimal.
144,000 = number with religious significance
147,273 = number of partitions of 48
152,381 = unique prime in base 20
156,146 = Keith number
161,051 = 115
161,280 = highly totient number
173,525 = number of partitions of 49
176,906 = number of 24-bead necklaces (turning over is allowed) where complements are equivalent
177,147 = 311
177,777 = smallest natural number requiring 19 syllables in American English, 21 in British English
178,478 = Leyland number
183,186 = Keith number
187,110 = Kaprekar number
194,481 = 214
195,000 = smallest triangular number divisible by 1000
195,025 = Pell number, Markov number
206,098 – Large Schröder number
206,265 = rounded number of arc seconds in a radian (see also parsec), since = 206,264.806...
207,360 = highly totient number
208,335 = the largest number to be both triangular and square pyramidal
208,495 = Kaprekar number
221,760 = 32nd highly composite number
262,144 = 218; exponential factorial of 4; a superperfect number
262,468 = Leyland number
291,400 = number of non-equivalent ways of expressing 100,000,000 as the sum of two prime numbers
293,547 = Wedderburn–Etherington number
294,685 = Markov number
326,981 = alternating factorial
329,967 = Kaprekar number
333,673 = sexy prime with 333,679
333,679 = sexy prime with 333,673
337,500 = 22 × 33 × 55
337,594 = number of 25-bead necklaces (turning over is allowed) where complements are equivalent
369,293 = smallest prime with the property that inserting a digit anywhere in the number will always yield a composite
370,261 = first prime followed by a prime gap of over 100
371,293 = 135, palindromic in base 12 (15AA5112)
389,305 = self-descriptive number in base 7
390,313 = Kaprekar number Entering 440000 at the prompt has been used to hack games that are protected against entering commands at the prompt after the game is loaded.
444,444 = repdigit
456,976 = 264
461,539 = Kaprekar number
510,510 = the product of the first seven prime numbers, thus the seventh primorial. It is also the product of four consecutive Fibonacci numbers—13, 21, 34, 55, the largest such sequence of any length to be also a primorial. And it is a double triangular number, the sum of all even numbers from 0 to 1428.
514,229 = Fibonacci prime,
518,859 = Schröder–Hipparchus number
599,999 = prime number.

600,000 to 699,999

604,800 = number of seconds in a week
611,953 = the 50,000th prime number
614,656 = 284
625,992 = Riordan number
629,933 = number of reduced trees with 28 nodes
694,280 = Keith number 10th colossally abundant number; 38th highly composite number, smallest number divisible by the numbers from 1 to 16
725,760 = highly totient number {783,701, 783,703, 783,707, 783,719, 783,721, 783,733, 783,737, 783,743, 783,749, 783,763, 783,767, 783,779, 783,781, 783,787, 783,791, 783,793, 783,799}
799,999 = prime number.

800,000 to 899,999

810,000 = 304
823,065 = number of trees with 20 unlabeled nodes
998,991 = largest triangular number with 6 digits and the 1413th triangular number
999,983 = largest 6-digit prime number
999,999 = repdigit. Rational numbers with denominators 7 and 13 have 6-digit repetends when expressed in decimal form, because 999999 is the smallest number one less than a power of 10 that is divisible by 7 and by 13.

Prime numbers

There are 9,592 primes less than 105, where 99,991 is the largest prime number smaller than 100,000.

Increments of 105 from 100,000 through a one million have the following prime counts:

8,392 primes between 100,000 and 200,000. This is a difference of 1,200 primes from the previous range.
104,729 is the 10,000th prime, which is in this range.
199,999 is prime.
8,013 primes between 200,000 and 300,000. A difference of 379 primes from the previous range.
224,737 is the 20,000th prime.
7,863 primes between 300,000 and 400,000. A difference of 150 primes from the previous range.
350,377 is the 30,000th prime.
7,678 primes between 400,000 and 500,000. A difference of 185 primes from the previous range. Here, the difference increases by a count of 35.
479,909 is the 40,000th prime.
7,560 primes between 500,000 and 600,000. A difference of 118 primes from the previous range.
7,560 is the twentieth highly composite number.