12565413 has 18 divisors (see below), whose sum is σ = 21114054. Its totient is φ = 7179984.

The previous prime is 12565409. The next prime is 12565433. The reversal of 12565413 is 31456521.

12565413 is a `hidden beast` number, since 1 + 2 + 5 + 654 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10870209 + 1695204 = 3297^2 + 1302^2 .

It is not a de Polignac number, because 12565413 - 2² = 12565409 is a prime.

It is a super-3 number, since 3×12565413³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565433) 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 17 ways as a sum of consecutive naturals, for example, 13806 + ... + 14687.

It is an arithmetic number, because the mean of its divisors is an integer number (1173003).

Almost surely, 2^12565413 is an apocalyptic number.

It is an amenable number.

12565413 is a deficient number, since it is larger than the sum of its proper divisors (8548641).

12565413 is a wasteful number, since it uses less digits than its factorization.

12565413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28513 (or 28503 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12565413 is about 3544.7726302261. The cubic root of 12565413 is about 232.4835645683.

The spelling of 12565413 in words is "twelve million, five hundred sixty-five thousand, four hundred thirteen".