115389 has 6 divisors (see below), whose sum is σ = 166686. Its totient is φ = 76920.

The previous prime is 115363. The next prime is 115399. The reversal of 115389 is 983511.

It can be written as a sum of positive squares in only one way, i.e., 71289 + 44100 = 267^2 + 210^2 .

It is not a de Polignac number, because 115389 - 2⁸ = 115133 is a prime.

It is a Curzon number.

115389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6402 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (27781).

2¹¹⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

115389 is a deficient number, since it is larger than the sum of its proper divisors (51297).

115389 is a wasteful number, since it uses less digits than its factorization.

115389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12827 (or 12824 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 115389 is about 339.6895641612. The cubic root of 115389 is about 48.6842110594.

The spelling of 115389 in words is "one hundred fifteen thousand, three hundred eighty-nine".