13661115 has 48 divisors (see below), whose sum is σ = 25139808. Its totient is φ = 6309888.

The previous prime is 13661083. The next prime is 13661191. The reversal of 13661115 is 51116631.

13661115 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13661115 - 2⁵ = 13661083 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42937 + ... + 43253.

It is an arithmetic number, because the mean of its divisors is an integer number (523746).

Almost surely, 2^13661115 is an apocalyptic number.

13661115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13661115 is a deficient number, since it is larger than the sum of its proper divisors (11478693).

13661115 is a wasteful number, since it uses less digits than its factorization.

13661115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 355 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 13661115 is about 3696.0945604787. The cubic root of 13661115 is about 239.0536518149.

Adding to 13661115 its reverse (51116631), we get a palindrome (64777746).

The spelling of 13661115 in words is "thirteen million, six hundred sixty-one thousand, one hundred fifteen".