13661575 has 12 divisors (see below), whose sum is σ = 16997920. Its totient is φ = 10892160.

The previous prime is 13661561. The next prime is 13661603. The reversal of 13661575 is 57516631.

13661575 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13661575 - 2⁷ = 13661447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13661575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8431 + ... + 9919.

Almost surely, 2^13661575 is an apocalyptic number.

13661575 is a deficient number, since it is larger than the sum of its proper divisors (3336345).

13661575 is a wasteful number, since it uses less digits than its factorization.

13661575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866 (or 1861 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 13661575 is about 3696.1567878000. The cubic root of 13661575 is about 239.0563349400.

The spelling of 13661575 in words is "thirteen million, six hundred sixty-one thousand, five hundred seventy-five".