13871685 has 8 divisors (see below), whose sum is σ = 22194720. Its totient is φ = 7398224.

The previous prime is 13871623. The next prime is 13871687. The reversal of 13871685 is 58617831.

13871685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13871685 - 2⁶ = 13871621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462375 + ... + 462404.

It is an arithmetic number, because the mean of its divisors is an integer number (2774340).

Almost surely, 2^13871685 is an apocalyptic number.

13871685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13871685 is a deficient number, since it is larger than the sum of its proper divisors (8323035).

13871685 is an equidigital number, since it uses as much as digits as its factorization.

13871685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924787.

The product of its digits is 40320, while the sum is 39.

The square root of 13871685 is about 3724.4711033917. The cubic root of 13871685 is about 240.2756381716.

The spelling of 13871685 in words is "thirteen million, eight hundred seventy-one thousand, six hundred eighty-five".