13661156 has 12 divisors (see below), whose sum is σ = 24040380. Its totient is φ = 6792480.

The previous prime is 13661083. The next prime is 13661191. The reversal of 13661156 is 65116631.

13661156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6553600 + 7107556 = 2560^2 + 2666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8711 + ... + 10158.

It is an arithmetic number, because the mean of its divisors is an integer number (2003365).

Almost surely, 2^13661156 is an apocalyptic number.

It is an amenable number.

13661156 is a deficient number, since it is larger than the sum of its proper divisors (10379224).

13661156 is a wasteful number, since it uses less digits than its factorization.

13661156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19054 (or 19052 counting only the distinct ones).

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

The square root of 13661156 is about 3696.1001068694. The cubic root of 13661156 is about 239.0538909654.

Adding to 13661156 its reverse (65116631), we get a palindrome (78777787).

The spelling of 13661156 in words is "thirteen million, six hundred sixty-one thousand, one hundred fifty-six".