13685121 has 12 divisors (see below), whose sum is σ = 19813248. Its totient is φ = 9102264.

The previous prime is 13685101. The next prime is 13685141. The reversal of 13685121 is 12158631.

13685121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13685101) and next prime (13685141).

It is not a de Polignac number, because 13685121 - 2⁶ = 13685057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13685101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3016 + ... + 6038.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^13685121 is an apocalyptic number.

It is an amenable number.

13685121 is a deficient number, since it is larger than the sum of its proper divisors (6128127).

13685121 is a wasteful number, since it uses less digits than its factorization.

13685121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532 (or 3529 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 13685121 is about 3699.3406169208. The cubic root of 13685121 is about 239.1935955844.

The spelling of 13685121 in words is "thirteen million, six hundred eighty-five thousand, one hundred twenty-one".