13857 has 8 divisors (see below), whose sum is σ = 19200. Its totient is φ = 8880.

The previous prime is 13841. The next prime is 13859. The reversal of 13857 is 75831.

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

It is not a de Polignac number, because 13857 - 2⁴ = 13841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13859) 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, 19 + ... + 167.

It is an arithmetic number, because the mean of its divisors is an integer number (2400).

2¹³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

13857 is a deficient number, since it is larger than the sum of its proper divisors (5343).

13857 is a wasteful number, since it uses less digits than its factorization.

13857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183.

The product of its digits is 840, while the sum is 24.

The square root of 13857 is about 117.7157593528. The cubic root of 13857 is about 24.0190820463.

The spelling of 13857 in words is "thirteen thousand, eight hundred fifty-seven".