13129256 has 24 divisors (see below), whose sum is σ = 28637370. Its totient is φ = 5626656.

The previous prime is 13129243. The next prime is 13129267. The reversal of 13129256 is 65292131.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 6421156 = 2590^2 + 2534^2 .

It is a super-2 number, since 2×13129256² = 344754726227072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16355 + ... + 17138.

Almost surely, 2^13129256 is an apocalyptic number.

It is an amenable number.

13129256 is an abundant number, since it is smaller than the sum of its proper divisors (15508114).

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

13129256 is a wasteful number, since it uses less digits than its factorization.

13129256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33513 (or 33502 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 13129256 is about 3623.4315227419. The cubic root of 13129256 is about 235.9101927755.

The spelling of 13129256 in words is "thirteen million, one hundred twenty-nine thousand, two hundred fifty-six".