115729172 has 30 divisors (see below), whose sum is σ = 219619218. Its totient is φ = 53360736.

The previous prime is 115729153. The next prime is 115729177. The reversal of 115729172 is 271927511.

It can be written as a sum of positive squares in 5 ways, for example, as 115648516 + 80656 = 10754^2 + 284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115729177) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 113738 + ... + 114750.

Almost surely, 2^115729172 is an apocalyptic number.

It is an amenable number.

115729172 is a deficient number, since it is larger than the sum of its proper divisors (103890046).

115729172 is an equidigital number, since it uses as much as digits as its factorization.

115729172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1028 counting only the distinct ones).

The product of its digits is 8820, while the sum is 35.

The square root of 115729172 is about 10757.7493928795. The cubic root of 115729172 is about 487.3200521036.

The spelling of 115729172 in words is "one hundred fifteen million, seven hundred twenty-nine thousand, one hundred seventy-two".