12564136 has 24 divisors (see below), whose sum is σ = 25512030. Its totient is φ = 5798208.

The previous prime is 12564121. The next prime is 12564137. The reversal of 12564136 is 63146521.

It can be written as a sum of positive squares in 3 ways, for example, as 3261636 + 9302500 = 1806^2 + 3050^2 .

It is not an unprimeable number, because it can be changed into a prime (12564137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3295 + ... + 5998.

Almost surely, 2^12564136 is an apocalyptic number.

It is an amenable number.

12564136 is an abundant number, since it is smaller than the sum of its proper divisors (12947894).

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

12564136 is a wasteful number, since it uses less digits than its factorization.

12564136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325 (or 9308 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 12564136 is about 3544.5925012616. The cubic root of 12564136 is about 232.4756886747.

It can be divided in two parts, 125 and 64136, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 12564136 in words is "twelve million, five hundred sixty-four thousand, one hundred thirty-six".