13601985 has 16 divisors (see below), whose sum is σ = 21850560. Its totient is φ = 7225280.

The previous prime is 13601981. The next prime is 13601999. The reversal of 13601985 is 58910631.

13601985 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13601985 - 2² = 13601981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13601981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2350 + ... + 5720.

It is an arithmetic number, because the mean of its divisors is an integer number (1365660).

Almost surely, 2^13601985 is an apocalyptic number.

13601985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13601985 is a deficient number, since it is larger than the sum of its proper divisors (8248575).

13601985 is a wasteful number, since it uses less digits than its factorization.

13601985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 13601985 is about 3688.0869024468. The cubic root of 13601985 is about 238.7082508800.

Subtracting from 13601985 its product of nonzero digits (6480), we obtain a triangular number (13595505 = T₅₂₁₄).

The spelling of 13601985 in words is "thirteen million, six hundred one thousand, nine hundred eighty-five".