12565513 has 2 divisors, whose sum is σ = 12565514. Its totient is φ = 12565512.

The previous prime is 12565493. The next prime is 12565519. The reversal of 12565513 is 31556521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9314704 + 3250809 = 3052^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 12565513 - 2⁵ = 12565481 is a prime.

It is not a weakly prime, because it can be changed into another prime (12565519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282756 + 6282757.

It is an arithmetic number, because the mean of its divisors is an integer number (6282757).

Almost surely, 2^12565513 is an apocalyptic number.

It is an amenable number.

12565513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565513 is an equidigital number, since it uses as much as digits as its factorization.

12565513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 28.

The square root of 12565513 is about 3544.7867354751. The cubic root of 12565513 is about 232.4841812955.

It can be divided in two parts, 12565 and 513, that multiplied together give a triangular number (6445845 = T₃₅₉₀).

The spelling of 12565513 in words is "twelve million, five hundred sixty-five thousand, five hundred thirteen".