12917256 has 64 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 3870720.

The previous prime is 12917249. The next prime is 12917269. The reversal of 12917256 is 65271921.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29616 + ... + 30048.

It is an arithmetic number, because the mean of its divisors is an integer number (556605).

Almost surely, 2^12917256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12917256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17811360).

12917256 is an abundant number, since it is smaller than the sum of its proper divisors (22705464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12917256 is a wasteful number, since it uses less digits than its factorization.

12917256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 562 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 12917256 is about 3594.0584302429. The cubic root of 12917256 is about 234.6335377791.

The spelling of 12917256 in words is "twelve million, nine hundred seventeen thousand, two hundred fifty-six".