42670731 has 16 divisors (see below), whose sum is σ = 61871904. Its totient is φ = 26049024.

The previous prime is 42670717. The next prime is 42670739. The reversal of 42670731 is 13707624.

It is not a de Polignac number, because 42670731 - 2⁵ = 42670699 is a prime.

It is a super-2 number, since 2×42670731² = 3641582568148722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42670739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9420 + ... + 13193.

It is an arithmetic number, because the mean of its divisors is an integer number (3866994).

Almost surely, 2^42670731 is an apocalyptic number.

42670731 is a deficient number, since it is larger than the sum of its proper divisors (19201173).

42670731 is a wasteful number, since it uses less digits than its factorization.

42670731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22670.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 42670731 is about 6532.2837507261. The cubic root of 42670731 is about 349.4432809241.

The spelling of 42670731 in words is "forty-two million, six hundred seventy thousand, seven hundred thirty-one".