115602721 has 4 divisors (see below), whose sum is σ = 124495252. Its totient is φ = 106710192.

The previous prime is 115602719. The next prime is 115602733. The reversal of 115602721 is 127206511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 86862400 = 5361^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 115602721 - 2¹ = 115602719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115602521) 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, 4446246 + ... + 4446271.

It is an arithmetic number, because the mean of its divisors is an integer number (31123813).

Almost surely, 2^115602721 is an apocalyptic number.

It is an amenable number.

115602721 is a deficient number, since it is larger than the sum of its proper divisors (8892531).

115602721 is an equidigital number, since it uses as much as digits as its factorization.

115602721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892530.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 115602721 is about 10751.8705814384. The cubic root of 115602721 is about 487.1424980085.

The spelling of 115602721 in words is "one hundred fifteen million, six hundred two thousand, seven hundred twenty-one".