42731956 has 12 divisors (see below), whose sum is σ = 74828992. Its totient is φ = 21352248.

The previous prime is 42731933. The next prime is 42731971. The reversal of 42731956 is 65913724.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7291 + ... + 11773.

Almost surely, 2^42731956 is an apocalyptic number.

It is an amenable number.

42731956 is a deficient number, since it is larger than the sum of its proper divisors (32097036).

42731956 is a wasteful number, since it uses less digits than its factorization.

42731956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6870 (or 6868 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 42731956 is about 6536.9684105096. The cubic root of 42731956 is about 349.6103309527.

The spelling of 42731956 in words is "forty-two million, seven hundred thirty-one thousand, nine hundred fifty-six".