13515985 has 16 divisors (see below), whose sum is σ = 18748800. Its totient is φ = 9161856.

The previous prime is 13515979. The next prime is 13516033. The reversal of 13515985 is 58951531.

It is a cyclic number.

It is not a de Polignac number, because 13515985 - 2⁷ = 13515857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946 + ... + 5284.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^13515985 is an apocalyptic number.

It is an amenable number.

13515985 is a deficient number, since it is larger than the sum of its proper divisors (5232815).

13515985 is an equidigital number, since it uses as much as digits as its factorization.

13515985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440.

The product of its digits is 27000, while the sum is 37.

The square root of 13515985 is about 3676.4092536060. The cubic root of 13515985 is about 238.2041007480.

The spelling of 13515985 in words is "thirteen million, five hundred fifteen thousand, nine hundred eighty-five".