13965985 has 16 divisors (see below), whose sum is σ = 18369792. Its totient is φ = 10108800.

The previous prime is 13965967. The next prime is 13965989. The reversal of 13965985 is 58956931.

It is not a de Polignac number, because 13965985 - 2⁹ = 13965473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13965989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14437 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (1148112).

Almost surely, 2^13965985 is an apocalyptic number.

It is an amenable number.

13965985 is a deficient number, since it is larger than the sum of its proper divisors (4403807).

13965985 is a wasteful number, since it uses less digits than its factorization.

13965985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its digits is 291600, while the sum is 46.

The square root of 13965985 is about 3737.1091768906. The cubic root of 13965985 is about 240.8188752896.

It can be divided in two parts, 1396 and 5985, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 13965985 in words is "thirteen million, nine hundred sixty-five thousand, nine hundred eighty-five".