42974631 has 20 divisors (see below), whose sum is σ = 73368592. Its totient is φ = 24556608.

The previous prime is 42974627. The next prime is 42974639. The reversal of 42974631 is 13647924.

It is not a de Polignac number, because 42974631 - 2² = 42974627 is a prime.

It is a super-2 number, since 2×42974631² = 3693637819172322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42974639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37330 + ... + 38463.

Almost surely, 2^42974631 is an apocalyptic number.

42974631 is a deficient number, since it is larger than the sum of its proper divisors (30393961).

42974631 is an equidigital number, since it uses as much as digits as its factorization.

42974631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75812 (or 75803 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42974631 is about 6555.5038707944. The cubic root of 42974631 is about 350.2708950389.

The spelling of 42974631 in words is "forty-two million, nine hundred seventy-four thousand, six hundred thirty-one".