115881 has 12 divisors (see below), whose sum is σ = 164592. Its totient is φ = 72504.

The previous prime is 115879. The next prime is 115883. The reversal of 115881 is 188511.

It is an interprime number because it is at equal distance from previous prime (115879) and next prime (115883).

It is not a de Polignac number, because 115881 - 2¹ = 115879 is a prime.

It is a super-2 number, since 2×115881² = 26856812322, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 115881.

It is not an unprimeable number, because it can be changed into a prime (115883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1030 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (13716).

2¹¹⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

115881 is a deficient number, since it is larger than the sum of its proper divisors (48711).

115881 is a wasteful number, since it uses less digits than its factorization.

115881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 129 counting only the distinct ones).

The product of its digits is 320, while the sum is 24.

The square root of 115881 is about 340.4129844762. The cubic root of 115881 is about 48.7533068105.

The spelling of 115881 in words is "one hundred fifteen thousand, eight hundred eighty-one".