42569731 has 4 divisors (see below), whose sum is σ = 43152952. Its totient is φ = 41986512.

The previous prime is 42569713. The next prime is 42569741. The reversal of 42569731 is 13796524.

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 42569731 - 2²³ = 34181123 is a prime.

It is a super-2 number, since 2×42569731² = 3624363994824722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42569701) 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, 291501 + ... + 291646.

It is an arithmetic number, because the mean of its divisors is an integer number (10788238).

Almost surely, 2^42569731 is an apocalyptic number.

42569731 is a deficient number, since it is larger than the sum of its proper divisors (583221).

42569731 is an equidigital number, since it uses as much as digits as its factorization.

42569731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583220.

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

The square root of 42569731 is about 6524.5483368583. The cubic root of 42569731 is about 349.1673567831.

The spelling of 42569731 in words is "forty-two million, five hundred sixty-nine thousand, seven hundred thirty-one".