115539 has 8 divisors (see below), whose sum is σ = 162240. Its totient is φ = 72936.

The previous prime is 115523. The next prime is 115547. The reversal of 115539 is 935511.

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

It is not a de Polignac number, because 115539 - 2⁴ = 115523 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (115589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (20280).

2¹¹⁵⁵³⁹ is an apocalyptic number.

115539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

115539 is a deficient number, since it is larger than the sum of its proper divisors (46701).

115539 is a wasteful number, since it uses less digits than its factorization.

115539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049.

The product of its digits is 675, while the sum is 24.

The square root of 115539 is about 339.9102822805. The cubic root of 115539 is about 48.7052976147.

The spelling of 115539 in words is "one hundred fifteen thousand, five hundred thirty-nine".