42431564 has 12 divisors (see below), whose sum is σ = 84863184. Its totient is φ = 18184944.

The previous prime is 42431549. The next prime is 42431567. The reversal of 42431564 is 46513424.

42431564 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42431567) 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, 757679 + ... + 757734.

It is an arithmetic number, because the mean of its divisors is an integer number (7071932).

Almost surely, 2^42431564 is an apocalyptic number.

It is an amenable number.

42431564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42431564 is a wasteful number, since it uses less digits than its factorization.

42431564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515424 (or 1515422 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 42431564 is about 6513.9514889198. The cubic root of 42431564 is about 348.7891874962.

Adding to 42431564 its reverse (46513424), we get a palindrome (88944988).

The spelling of 42431564 in words is "forty-two million, four hundred thirty-one thousand, five hundred sixty-four".