115891 has 2 divisors, whose sum is σ = 115892. Its totient is φ = 115890.

The previous prime is 115883. The next prime is 115901. The reversal of 115891 is 198511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115891 - 2³ = 115883 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (115811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57945 + 57946.

It is an arithmetic number, because the mean of its divisors is an integer number (57946).

2¹¹⁵⁸⁹¹ is an apocalyptic number.

115891 is a deficient number, since it is larger than the sum of its proper divisors (1).

115891 is an equidigital number, since it uses as much as digits as its factorization.

115891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 25.

The square root of 115891 is about 340.4276722007. The cubic root of 115891 is about 48.7547091660.

The spelling of 115891 in words is "one hundred fifteen thousand, eight hundred ninety-one".