42702931 has 4 divisors (see below), whose sum is σ = 43611552. Its totient is φ = 41794312.

The previous prime is 42702917. The next prime is 42702941. The reversal of 42702931 is 13920724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42702931 - 2²¹ = 40605779 is a prime.

It is a super-2 number, since 2×42702931² = 3647080631981522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42702931.

It is not an unprimeable number, because it can be changed into a prime (42702941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454240 + ... + 454333.

It is an arithmetic number, because the mean of its divisors is an integer number (10902888).

Almost surely, 2^42702931 is an apocalyptic number.

42702931 is a deficient number, since it is larger than the sum of its proper divisors (908621).

42702931 is an equidigital number, since it uses as much as digits as its factorization.

42702931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908620.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 42702931 is about 6534.7479675960. The cubic root of 42702931 is about 349.5311572759.

The spelling of 42702931 in words is "forty-two million, seven hundred two thousand, nine hundred thirty-one".