115871 has 4 divisors (see below), whose sum is σ = 132432. Its totient is φ = 99312.

The previous prime is 115861. The next prime is 115873. The reversal of 115871 is 178511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178511 = 137 ⋅1303.

It is a cyclic number.

It is not a de Polignac number, because 115871 - 2⁶ = 115807 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 (115873) 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, 8270 + ... + 8283.

It is an arithmetic number, because the mean of its divisors is an integer number (33108).

2¹¹⁵⁸⁷¹ is an apocalyptic number.

115871 is a deficient number, since it is larger than the sum of its proper divisors (16561).

115871 is an equidigital number, since it uses as much as digits as its factorization.

115871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560.

The product of its digits is 280, while the sum is 23.

The square root of 115871 is about 340.3982961179. The cubic root of 115871 is about 48.7519043744.

The spelling of 115871 in words is "one hundred fifteen thousand, eight hundred seventy-one".