12564985 has 8 divisors (see below), whose sum is σ = 15871680. Its totient is φ = 9522864.

The previous prime is 12564977. The next prime is 12565009. The reversal of 12564985 is 58946521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12564985 - 2³ = 12564977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66037 + ... + 66226.

It is an arithmetic number, because the mean of its divisors is an integer number (1983960).

Almost surely, 2^12564985 is an apocalyptic number.

It is an amenable number.

12564985 is a deficient number, since it is larger than the sum of its proper divisors (3306695).

12564985 is a wasteful number, since it uses less digits than its factorization.

12564985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132287.

The product of its digits is 86400, while the sum is 40.

The square root of 12564985 is about 3544.7122591263. The cubic root of 12564985 is about 232.4809249391.

It can be divided in two parts, 1256 and 4985, that added together give a square (6241 = 79²).

The spelling of 12564985 in words is "twelve million, five hundred sixty-four thousand, nine hundred eighty-five".