12656513 has 4 divisors (see below), whose sum is σ = 12703488. Its totient is φ = 12609540.

The previous prime is 12656477. The next prime is 12656519. The reversal of 12656513 is 31565621.

12656513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31565621 = 479 ⋅65899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12656513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12656519) 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, 23081 + ... + 23622.

It is an arithmetic number, because the mean of its divisors is an integer number (3175872).

Almost surely, 2^12656513 is an apocalyptic number.

It is an amenable number.

12656513 is a deficient number, since it is larger than the sum of its proper divisors (46975).

12656513 is an equidigital number, since it uses as much as digits as its factorization.

12656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46974.

The product of its digits is 5400, while the sum is 29.

The square root of 12656513 is about 3557.5993310096. The cubic root of 12656513 is about 233.0440521618.

The spelling of 12656513 in words is "twelve million, six hundred fifty-six thousand, five hundred thirteen".