157173 has 4 divisors (see below), whose sum is σ = 209568. Its totient is φ = 104780.

The previous prime is 157163. The next prime is 157177. The reversal of 157173 is 371751.

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 157173 - 2⁵ = 157141 is a prime.

It is a D-number.

157173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157177) 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, 26193 + ... + 26198.

It is an arithmetic number, because the mean of its divisors is an integer number (52392).

2¹⁵⁷¹⁷³ is an apocalyptic number.

It is an amenable number.

157173 is a deficient number, since it is larger than the sum of its proper divisors (52395).

157173 is an equidigital number, since it uses as much as digits as its factorization.

157173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52394.

The product of its digits is 735, while the sum is 24.

The square root of 157173 is about 396.4505013239. The cubic root of 157173 is about 53.9667147412.

The spelling of 157173 in words is "one hundred fifty-seven thousand, one hundred seventy-three".