115082721 has 16 divisors (see below), whose sum is σ = 183608320. Its totient is φ = 70819920.

The previous prime is 115082689. The next prime is 115082789. The reversal of 115082721 is 127280511.

It is not a de Polignac number, because 115082721 - 2⁵ = 115082689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115082021) 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, 163585 + ... + 164286.

It is an arithmetic number, because the mean of its divisors is an integer number (11475520).

Almost surely, 2^115082721 is an apocalyptic number.

It is an amenable number.

115082721 is a deficient number, since it is larger than the sum of its proper divisors (68525599).

115082721 is a wasteful number, since it uses less digits than its factorization.

115082721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327893 (or 327887 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 115082721 is about 10727.6614879479. The cubic root of 115082721 is about 486.4109844682.

The spelling of 115082721 in words is "one hundred fifteen million, eighty-two thousand, seven hundred twenty-one".