12563978 has 32 divisors (see below), whose sum is σ = 22896000. Its totient is φ = 5050944.

The previous prime is 12563977. The next prime is 12564001. The reversal of 12563978 is 87936521.

It is not an unprimeable number, because it can be changed into a prime (12563977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39476 + ... + 39792.

It is an arithmetic number, because the mean of its divisors is an integer number (715500).

Almost surely, 2^12563978 is an apocalyptic number.

12563978 is a deficient number, since it is larger than the sum of its proper divisors (10332022).

12563978 is a wasteful number, since it uses less digits than its factorization.

12563978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

The product of its digits is 90720, while the sum is 41.

The square root of 12563978 is about 3544.5702137213. The cubic root of 12563978 is about 232.4747141731.

The spelling of 12563978 in words is "twelve million, five hundred sixty-three thousand, nine hundred seventy-eight".