13391656 has 24 divisors (see below), whose sum is σ = 26506170. Its totient is φ = 6342048.

The previous prime is 13391641. The next prime is 13391683. The reversal of 13391656 is 65619331.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 902500 = 3534^2 + 950^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570 + ... + 5206.

Almost surely, 2^13391656 is an apocalyptic number.

It is an amenable number.

13391656 is a deficient number, since it is larger than the sum of its proper divisors (13114514).

13391656 is a wasteful number, since it uses less digits than its factorization.

13391656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681 (or 4658 counting only the distinct ones).

The product of its digits is 14580, while the sum is 34.

The square root of 13391656 is about 3659.4611625211. The cubic root of 13391656 is about 237.4714632380.

The spelling of 13391656 in words is "thirteen million, three hundred ninety-one thousand, six hundred fifty-six".