115431405 has 16 divisors (see below), whose sum is σ = 186041664. Its totient is φ = 61112960.

The previous prime is 115431391. The next prime is 115431413. The reversal of 115431405 is 504134511.

It is a happy number.

It is not a de Polignac number, because 115431405 - 2⁵ = 115431373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26031 + ... + 30140.

It is an arithmetic number, because the mean of its divisors is an integer number (11627604).

Almost surely, 2^115431405 is an apocalyptic number.

115431405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115431405 is a deficient number, since it is larger than the sum of its proper divisors (70610259).

115431405 is a wasteful number, since it uses less digits than its factorization.

115431405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56316.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 115431405 is about 10743.9008279116. The cubic root of 115431405 is about 486.9017408053.

Adding to 115431405 its reverse (504134511), we get a palindrome (619565916).

The spelling of 115431405 in words is "one hundred fifteen million, four hundred thirty-one thousand, four hundred five".