115379561 has 16 divisors (see below), whose sum is σ = 135276480. Its totient is φ = 97236480.

The previous prime is 115379549. The next prime is 115379567. The reversal of 115379561 is 165973511.

It is not a de Polignac number, because 115379561 - 2⁶ = 115379497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115379567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7925 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (8454780).

Almost surely, 2^115379561 is an apocalyptic number.

115379561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115379561 is a deficient number, since it is larger than the sum of its proper divisors (19896919).

115379561 is a wasteful number, since it uses less digits than its factorization.

115379561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304.

The product of its digits is 28350, while the sum is 38.

The square root of 115379561 is about 10741.4878392148. The cubic root of 115379561 is about 486.8288354178.

The spelling of 115379561 in words is "one hundred fifteen million, three hundred seventy-nine thousand, five hundred sixty-one".