115652721 has 4 divisors (see below), whose sum is σ = 154203632. Its totient is φ = 77101812.

The previous prime is 115652711. The next prime is 115652729. The reversal of 115652721 is 127256511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 115652721 - 2⁵ = 115652689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115652729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19275451 + ... + 19275456.

It is an arithmetic number, because the mean of its divisors is an integer number (38550908).

Almost surely, 2^115652721 is an apocalyptic number.

It is an amenable number.

115652721 is a deficient number, since it is larger than the sum of its proper divisors (38550911).

115652721 is an equidigital number, since it uses as much as digits as its factorization.

115652721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38550910.

The product of its digits is 4200, while the sum is 30.

The square root of 115652721 is about 10754.1955068708. The cubic root of 115652721 is about 487.2127201564.

The spelling of 115652721 in words is "one hundred fifteen million, six hundred fifty-two thousand, seven hundred twenty-one".