13291136 has 16 divisors (see below), whose sum is σ = 26478690. Its totient is φ = 6645504.

The previous prime is 13291121. The next prime is 13291139. The reversal of 13291136 is 63119231.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 2689600 = 3256^2 + 1640^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (13291139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51791 + ... + 52046.

Almost surely, 2^13291136 is an apocalyptic number.

13291136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13291136 is a deficient number, since it is larger than the sum of its proper divisors (13187554).

13291136 is an equidigital number, since it uses as much as digits as its factorization.

13291136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103851 (or 103839 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 13291136 is about 3645.7010299804. The cubic root of 13291136 is about 236.8758035863.

The spelling of 13291136 in words is "thirteen million, two hundred ninety-one thousand, one hundred thirty-six".