115123157 has 4 divisors (see below), whose sum is σ = 116142060. Its totient is φ = 114104256.

The previous prime is 115123153. The next prime is 115123159. The reversal of 115123157 is 751321511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751321511 = 17 ⋅44195383.

It can be written as a sum of positive squares in 2 ways, for example, as 7150276 + 107972881 = 2674^2 + 10391^2 .

It is a cyclic number.

It is not a de Polignac number, because 115123157 - 2² = 115123153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115123153) 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, 509282 + ... + 509507.

It is an arithmetic number, because the mean of its divisors is an integer number (29035515).

Almost surely, 2^115123157 is an apocalyptic number.

It is an amenable number.

115123157 is a deficient number, since it is larger than the sum of its proper divisors (1018903).

115123157 is a wasteful number, since it uses less digits than its factorization.

115123157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018902.

The product of its digits is 1050, while the sum is 26.

The square root of 115123157 is about 10729.5459829389. The cubic root of 115123157 is about 486.4679470057.

Adding to 115123157 its reverse (751321511), we get a palindrome (866444668).

The spelling of 115123157 in words is "one hundred fifteen million, one hundred twenty-three thousand, one hundred fifty-seven".