13091256 has 48 divisors (see below), whose sum is σ = 35694360. Its totient is φ = 4334400.

The previous prime is 13091251. The next prime is 13091261. The reversal of 13091256 is 65219031.

13091256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13091251) and next prime (13091261).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13091251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11931 + ... + 12981.

Almost surely, 2^13091256 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 13091256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17847180).

13091256 is an abundant number, since it is smaller than the sum of its proper divisors (22603104).

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

13091256 is a wasteful number, since it uses less digits than its factorization.

13091256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 13091256 is about 3618.1840749194. The cubic root of 13091256 is about 235.6823745860.

The spelling of 13091256 in words is "thirteen million, ninety-one thousand, two hundred fifty-six".