12564785 has 16 divisors (see below), whose sum is σ = 16661376. Its totient is φ = 9047808.

The previous prime is 12564781. The next prime is 12564787. The reversal of 12564785 is 58746521.

It is not a de Polignac number, because 12564785 - 2² = 12564781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564781) 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, 1259 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (1041336).

Almost surely, 2^12564785 is an apocalyptic number.

It is an amenable number.

12564785 is a deficient number, since it is larger than the sum of its proper divisors (4096591).

12564785 is a wasteful number, since it uses less digits than its factorization.

12564785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472.

The product of its digits is 67200, while the sum is 38.

The square root of 12564785 is about 3544.6840479795. The cubic root of 12564785 is about 232.4796914469.

The spelling of 12564785 in words is "twelve million, five hundred sixty-four thousand, seven hundred eighty-five".