46 (forty-six) is the natural number following 45 and preceding 47.
In mathematics
46 is a composite number, a centered triangular number, and a Wedderburn-Etherington number, and an Erdős–Woods number.
In sports
- The number of mountains in the 46 peaks of the Adirondack mountain range. People who have climbed all of them are called "forty-sixers".
- The number 46 is used to identify Valentino Rossi. The number is retired (no longer used) in the MotoGP after Rossi's retirement in 2022.
In other fields
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Forty-six is also:
- Because 46 in Japanese can be pronounced as "yon roku", and "yoroshiku" (よろしく) means "my best regards" in Japanese, people sometimes use 46 for greeting.
- An international calling code for Sweden.
- The number of chromosomes in a typical human somatic cell, arranged in 23 pairs.