12556317 has 4 divisors (see below), whose sum is σ = 16741760. Its totient is φ = 8370876.

The previous prime is 12556309. The next prime is 12556331. The reversal of 12556317 is 71365521.

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: 71365521 = 3 ⋅23788507.

It is not a de Polignac number, because 12556317 - 2³ = 12556309 is a prime.

It is a super-2 number, since 2×12556317² = 315322193208978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556307) 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, 2092717 + ... + 2092722.

It is an arithmetic number, because the mean of its divisors is an integer number (4185440).

Almost surely, 2^12556317 is an apocalyptic number.

It is an amenable number.

12556317 is a deficient number, since it is larger than the sum of its proper divisors (4185443).

12556317 is an equidigital number, since it uses as much as digits as its factorization.

12556317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185442.

The product of its digits is 6300, while the sum is 30.

The square root of 12556317 is about 3543.4893819511. The cubic root of 12556317 is about 232.4274533745.

The spelling of 12556317 in words is "twelve million, five hundred fifty-six thousand, three hundred seventeen".