12565313 has 4 divisors (see below), whose sum is σ = 12572868. Its totient is φ = 12557760.

The previous prime is 12565307. The next prime is 12565339. The reversal of 12565313 is 31356521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5345344 + 7219969 = 2312^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 12565313 - 2⁴ = 12565297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12565513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (3143217).

Almost surely, 2^12565313 is an apocalyptic number.

It is an amenable number.

12565313 is a deficient number, since it is larger than the sum of its proper divisors (7555).

12565313 is an equidigital number, since it uses as much as digits as its factorization.

12565313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

The product of its digits is 2700, while the sum is 26.

The square root of 12565313 is about 3544.7585249210. The cubic root of 12565313 is about 232.4829478379.

The spelling of 12565313 in words is "twelve million, five hundred sixty-five thousand, three hundred thirteen".