13685745 has 16 divisors (see below), whose sum is σ = 22489920. Its totient is φ = 7101504.

The previous prime is 13685741. The next prime is 13685773. The reversal of 13685745 is 54758631.

It is not a de Polignac number, because 13685745 - 2² = 13685741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13685741) by changing a digit.

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, 11775 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (1405620).

Almost surely, 2^13685745 is an apocalyptic number.

13685745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13685745 is a deficient number, since it is larger than the sum of its proper divisors (8804175).

13685745 is a wasteful number, since it uses less digits than its factorization.

13685745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24704.

The product of its digits is 100800, while the sum is 39.

The square root of 13685745 is about 3699.4249553140. The cubic root of 13685745 is about 239.1972310299.

The spelling of 13685745 in words is "thirteen million, six hundred eighty-five thousand, seven hundred forty-five".