115186721 has 16 divisors (see below), whose sum is σ = 131423040. Its totient is φ = 100077120.

The previous prime is 115186717. The next prime is 115186733. The reversal of 115186721 is 127681511.

It is not a de Polignac number, because 115186721 - 2² = 115186717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115186711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38831 + ... + 41691.

It is an arithmetic number, because the mean of its divisors is an integer number (8213940).

Almost surely, 2^115186721 is an apocalyptic number.

It is an amenable number.

115186721 is a deficient number, since it is larger than the sum of its proper divisors (16236319).

115186721 is a wasteful number, since it uses less digits than its factorization.

115186721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056.

The product of its digits is 3360, while the sum is 32.

The square root of 115186721 is about 10732.5076752826. The cubic root of 115186721 is about 486.5574631959.

The spelling of 115186721 in words is "one hundred fifteen million, one hundred eighty-six thousand, seven hundred twenty-one".