115391 has 8 divisors (see below), whose sum is σ = 125280. Its totient is φ = 105952.

The previous prime is 115363. The next prime is 115399. The reversal of 115391 is 193511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115391 - 2⁶ = 115327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581 + ... + 753.

It is an arithmetic number, because the mean of its divisors is an integer number (15660).

2¹¹⁵³⁹¹ is an apocalyptic number.

115391 is a deficient number, since it is larger than the sum of its proper divisors (9889).

115391 is a wasteful number, since it uses less digits than its factorization.

115391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225.

The product of its digits is 135, while the sum is 20.

The square root of 115391 is about 339.6925080128. The cubic root of 115391 is about 48.6844923337.

The spelling of 115391 in words is "one hundred fifteen thousand, three hundred ninety-one".