12564915 has 32 divisors (see below), whose sum is σ = 22090752. Its totient is φ = 6048000.

The previous prime is 12564911. The next prime is 12564919. The reversal of 12564915 is 51946521.

It is an interprime number because it is at equal distance from previous prime (12564911) and next prime (12564919).

It is not a de Polignac number, because 12564915 - 2² = 12564911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12564911) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 44575 + ... + 44855.

It is an arithmetic number, because the mean of its divisors is an integer number (690336).

Almost surely, 2^12564915 is an apocalyptic number.

12564915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12564915 is a deficient number, since it is larger than the sum of its proper divisors (9525837).

12564915 is a wasteful number, since it uses less digits than its factorization.

12564915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its digits is 10800, while the sum is 33.

The square root of 12564915 is about 3544.7023852504. The cubic root of 12564915 is about 232.4804932183.

The spelling of 12564915 in words is "twelve million, five hundred sixty-four thousand, nine hundred fifteen".