158173 has 4 divisors (see below), whose sum is σ = 160828. Its totient is φ = 155520.

The previous prime is 158161. The next prime is 158189. The reversal of 158173 is 371851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41209 + 116964 = 203^2 + 342^2 .

It is a cyclic number.

It is not a de Polignac number, because 158173 - 2⁵ = 158141 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (40207).

2¹⁵⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

158173 is a deficient number, since it is larger than the sum of its proper divisors (2655).

158173 is an equidigital number, since it uses as much as digits as its factorization.

158173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654.

The product of its digits is 840, while the sum is 25.

The square root of 158173 is about 397.7096931180. The cubic root of 158173 is about 54.0809257585.

The spelling of 158173 in words is "one hundred fifty-eight thousand, one hundred seventy-three".