115799121 has 27 divisors (see below), whose sum is σ = 178529403. Its totient is φ = 72313920.

The previous prime is 115799119. The next prime is 115799141. The reversal of 115799121 is 121997511.

The square root of 115799121 is 10761.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 25644096 = 9495^2 + 5064^2 .

It is not a de Polignac number, because 115799121 - 2¹ = 115799119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115799141) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 548706 + ... + 548916.

Almost surely, 2^115799121 is an apocalyptic number.

115799121 is the 10761-st square number.

115799121 is the 5381-st centered octagonal number.

It is an amenable number.

115799121 is a deficient number, since it is larger than the sum of its proper divisors (62730282).

115799121 is an equidigital number, since it uses as much as digits as its factorization.

115799121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 231 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The cubic root of 115799121 is about 487.4182142878.

Multiplying 115799121 by its sum of digits (36), we get a square (4168768356 = 64566²).

It can be divided in two parts, 115 and 799121, that added together give a square (799236 = 894²).

The spelling of 115799121 in words is "one hundred fifteen million, seven hundred ninety-nine thousand, one hundred twenty-one".