115725321 has 16 divisors (see below), whose sum is σ = 172800000. Its totient is φ = 76540464.

The previous prime is 115725287. The next prime is 115725349. The reversal of 115725321 is 123527511.

It is not a de Polignac number, because 115725321 - 2⁷ = 115725193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115725391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13446 + ... + 20303.

It is an arithmetic number, because the mean of its divisors is an integer number (10800000).

Almost surely, 2^115725321 is an apocalyptic number.

It is an amenable number.

115725321 is a deficient number, since it is larger than the sum of its proper divisors (57074679).

115725321 is a wasteful number, since it uses less digits than its factorization.

115725321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33885 (or 33879 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 115725321 is about 10757.5704041387. The cubic root of 115725321 is about 487.3146466952.

The spelling of 115725321 in words is "one hundred fifteen million, seven hundred twenty-five thousand, three hundred twenty-one".