13565985 has 8 divisors (see below), whose sum is σ = 21705600. Its totient is φ = 7235184.

The previous prime is 13565977. The next prime is 13566037. The reversal of 13565985 is 58956531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13565985 - 2³ = 13565977 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452185 + ... + 452214.

It is an arithmetic number, because the mean of its divisors is an integer number (2713200).

Almost surely, 2^13565985 is an apocalyptic number.

13565985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13565985 is a deficient number, since it is larger than the sum of its proper divisors (8139615).

13565985 is an equidigital number, since it uses as much as digits as its factorization.

13565985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904407.

The product of its digits is 162000, while the sum is 42.

The square root of 13565985 is about 3683.2030897033. The cubic root of 13565985 is about 238.4974706253.

The spelling of 13565985 in words is "thirteen million, five hundred sixty-five thousand, nine hundred eighty-five".