115439 has 4 divisors (see below), whose sum is σ = 116160. Its totient is φ = 114720.

The previous prime is 115429. The next prime is 115459. The reversal of 115439 is 934511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 934511 = 631 ⋅1481.

It is a cyclic number.

It is not a de Polignac number, because 115439 - 2⁸ = 115183 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115429) 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 3 ways as a sum of consecutive naturals, for example, 2 + ... + 480.

It is an arithmetic number, because the mean of its divisors is an integer number (29040).

2¹¹⁵⁴³⁹ is an apocalyptic number.

115439 is a deficient number, since it is larger than the sum of its proper divisors (721).

115439 is an equidigital number, since it uses as much as digits as its factorization.

115439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its digits is 540, while the sum is 23.

The square root of 115439 is about 339.7631527991. The cubic root of 115439 is about 48.6912419406.

The spelling of 115439 in words is "one hundred fifteen thousand, four hundred thirty-nine".