158257 has 4 divisors (see below), whose sum is σ = 172656. Its totient is φ = 143860.

The previous prime is 158243. The next prime is 158261. The reversal of 158257 is 752851.

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 158257 - 2⁷ = 158129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158227) 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, 7183 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (43164).

2¹⁵⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

158257 is a deficient number, since it is larger than the sum of its proper divisors (14399).

158257 is a wasteful number, since it uses less digits than its factorization.

158257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14398.

The product of its digits is 2800, while the sum is 28.

The square root of 158257 is about 397.8152837687. The cubic root of 158257 is about 54.0904975435.

The spelling of 158257 in words is "one hundred fifty-eight thousand, two hundred fifty-seven".