13256397 has 72 divisors (see below), whose sum is σ = 25229568. Its totient is φ = 6557760.

The previous prime is 13256377. The next prime is 13256401. The reversal of 13256397 is 79365231.

13256397 is a `hidden beast` number, since 1 + 3 + 2 + 563 + 97 = 666.

13256397 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13256397 - 2⁶ = 13256333 is a prime.

It is a super-2 number, since 2×13256397² = 351464122843218, which contains 22 as substring.

Its product of digits (34020) is a multiple of the sum of its prime divisors (105).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13256377) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 282028 + ... + 282074.

Almost surely, 2^13256397 is an apocalyptic number.

It is an amenable number.

13256397 is a deficient number, since it is larger than the sum of its proper divisors (11973171).

13256397 is a wasteful number, since it uses less digits than its factorization.

13256397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 105 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 13256397 is about 3640.9335341365. The cubic root of 13256397 is about 236.6692496798.

The spelling of 13256397 in words is "thirteen million, two hundred fifty-six thousand, three hundred ninety-seven".