141 (one hundred [and] forty-one) is the natural number following 140 and preceding 142.
In mathematics
141 is:
- a centered pentagonal number.
- the sum of the sums of the divisors of the first 13 positive integers.
- the second n to give a prime Cullen number (of the form n2<sup>n</sup> + 1).
- the first three digits after the decimal point in the base 10 representation of pi (3.141592...)
- an undulating number in base 10, with the previous being 131, and the next being 151.
- the sixth hendecagonal (11-gonal) number.
- a semiprime: a product of two prime numbers, namely 3 and 47. Since those prime factors are Gaussian primes, this means that 141 is a Blum integer.
- a Hilbert prime
- Sometimes used as an acronym [1 representing A and 4 representing D] to stand for Anti Deforestation Action, often used by radical environmentalists