Forty two
42 is an even number.
42 is a Harshad number, which means it is divisible by the sum of its digits (4 + 2 = 6, and 42 is divisible by 6).
In binary, 42 is represented as 101010.
In hex, 42 is represented as 2a.
Prime factorization of 42: 2 * 3 * 7.