157171 has 4 divisors (see below), whose sum is σ = 179632. Its totient is φ = 134712.

The previous prime is 157163. The next prime is 157177. The reversal of 157171 is 171751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171751 = 17 ⋅10103.

It is a cyclic number.

It is not a de Polignac number, because 157171 - 2³ = 157163 is a prime.

It is an Ulam number.

It is a Duffinian number.

157171 is a lucky 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, 11220 + ... + 11233.

It is an arithmetic number, because the mean of its divisors is an integer number (44908).

2¹⁵⁷¹⁷¹ is an apocalyptic number.

157171 is a deficient number, since it is larger than the sum of its proper divisors (22461).

157171 is an equidigital number, since it uses as much as digits as its factorization.

157171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460.

The product of its digits is 245, while the sum is 22.

The square root of 157171 is about 396.4479789329. The cubic root of 157171 is about 53.9664858344.

The spelling of 157171 in words is "one hundred fifty-seven thousand, one hundred seventy-one".