12564715 has 4 divisors (see below), whose sum is σ = 15077664. Its totient is φ = 10051768.

The previous prime is 12564709. The next prime is 12564731. The reversal of 12564715 is 51746521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51746521 = 17 ⋅3043913.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12564715 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1256467 + ... + 1256476.

It is an arithmetic number, because the mean of its divisors is an integer number (3769416).

Almost surely, 2^12564715 is an apocalyptic number.

12564715 is a deficient number, since it is larger than the sum of its proper divisors (2512949).

12564715 is an equidigital number, since it uses as much as digits as its factorization.

12564715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512948.

The product of its digits is 8400, while the sum is 31.

The square root of 12564715 is about 3544.6741740250. The cubic root of 12564715 is about 232.4792597216.

The spelling of 12564715 in words is "twelve million, five hundred sixty-four thousand, seven hundred fifteen".