13256881 has 9 divisors (see below), whose sum is σ = 14615769. Its totient is φ = 12015300.

The previous prime is 13256879. The next prime is 13256897. The reversal of 13256881 is 18865231.

The square root of 13256881 is 3641.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13256881 - 2¹ = 13256879 is a prime.

It is a super-2 number, since 2×13256881² = 351489787696322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13256801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39886 + ... + 40216.

Almost surely, 2^13256881 is an apocalyptic number.

13256881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13256881 is the 3641-st square number.

13256881 is the 1821-st centered octagonal number.

It is an amenable number.

13256881 is a deficient number, since it is larger than the sum of its proper divisors (1358888).

13256881 is an frugal number, since it uses more digits than its factorization.

13256881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 342 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The cubic root of 13256881 is about 236.6721299627.

The spelling of 13256881 in words is "thirteen million, two hundred fifty-six thousand, eight hundred eighty-one".