13291856 has 10 divisors (see below), whose sum is σ = 25753002. Its totient is φ = 6645920.

The previous prime is 13291823. The next prime is 13291871. The reversal of 13291856 is 65819231.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 1731856 = 3400^2 + 1316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415355 + ... + 415386.

Almost surely, 2^13291856 is an apocalyptic number.

13291856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13291856 is a deficient number, since it is larger than the sum of its proper divisors (12461146).

13291856 is an equidigital number, since it uses as much as digits as its factorization.

13291856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830749 (or 830743 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 13291856 is about 3645.7997750837. The cubic root of 13291856 is about 236.8800808103.

The spelling of 13291856 in words is "thirteen million, two hundred ninety-one thousand, eight hundred fifty-six".