157169 has 4 divisors (see below), whose sum is σ = 159396. Its totient is φ = 154944.

The previous prime is 157163. The next prime is 157177. The reversal of 157169 is 961751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961751 = 7 ⋅137393.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 112225 = 212^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 157169 - 2⁸ = 156913 is a prime.

It is a super-2 number, since 2×157169² = 49404189122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (157163) 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, 1004 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (39849).

2¹⁵⁷¹⁶⁹ is an apocalyptic number.

It is an amenable number.

157169 is a deficient number, since it is larger than the sum of its proper divisors (2227).

157169 is an equidigital number, since it uses as much as digits as its factorization.

157169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226.

The product of its digits is 1890, while the sum is 29.

The square root of 157169 is about 396.4454565259. The cubic root of 157169 is about 53.9662569257.

The spelling of 157169 in words is "one hundred fifty-seven thousand, one hundred sixty-nine".