158165 has 8 divisors (see below), whose sum is σ = 216960. Its totient is φ = 108432.

The previous prime is 158161. The next prime is 158189. The reversal of 158165 is 561851.

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 158165 - 2² = 158161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158161) 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, 2225 + ... + 2294.

It is an arithmetic number, because the mean of its divisors is an integer number (27120).

2¹⁵⁸¹⁶⁵ is an apocalyptic number.

It is an amenable number.

158165 is a deficient number, since it is larger than the sum of its proper divisors (58795).

158165 is an equidigital number, since it uses as much as digits as its factorization.

158165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531.

The product of its digits is 1200, while the sum is 26.

The square root of 158165 is about 397.6996354034. The cubic root of 158165 is about 54.0800139832.

It can be divided in two parts, 158 and 165, that added together give a palindrome (323).

The spelling of 158165 in words is "one hundred fifty-eight thousand, one hundred sixty-five".