12563915 has 32 divisors (see below), whose sum is σ = 18942336. Its totient is φ = 7787520.

The previous prime is 12563857. The next prime is 12563927. The reversal of 12563915 is 51936521.

It is not a de Polignac number, because 12563915 - 2⁶ = 12563851 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 31 ways as a sum of consecutive naturals, for example, 23855 + ... + 24375.

It is an arithmetic number, because the mean of its divisors is an integer number (591948).

Almost surely, 2^12563915 is an apocalyptic number.

12563915 is a deficient number, since it is larger than the sum of its proper divisors (6378421).

12563915 is a wasteful number, since it uses less digits than its factorization.

12563915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

The product of its digits is 8100, while the sum is 32.

The square root of 12563915 is about 3544.5613268781. The cubic root of 12563915 is about 232.4743256037.

The spelling of 12563915 in words is "twelve million, five hundred sixty-three thousand, nine hundred fifteen".