158857 has 4 divisors (see below), whose sum is σ = 161296. Its totient is φ = 156420.

The previous prime is 158849. The next prime is 158863. The reversal of 158857 is 758851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158857 - 2³ = 158849 is a prime.

It is an Ulam number.

It is a Duffinian number.

158857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (158867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (40324).

2¹⁵⁸⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

158857 is a deficient number, since it is larger than the sum of its proper divisors (2439).

158857 is an equidigital number, since it uses as much as digits as its factorization.

158857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438.

The product of its digits is 11200, while the sum is 34.

The square root of 158857 is about 398.5686891867. The cubic root of 158857 is about 54.1587691313.

The spelling of 158857 in words is "one hundred fifty-eight thousand, eight hundred fifty-seven".