115221125 has 16 divisors (see below), whose sum is σ = 144182064. Its totient is φ = 91929600.

The previous prime is 115221107. The next prime is 115221151. The reversal of 115221125 is 521122511.

It can be written as a sum of positive squares in 8 ways, for example, as 5013121 + 110208004 = 2239^2 + 10498^2 .

It is not a de Polignac number, because 115221125 - 2²⁰ = 114172549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115221097 and 115221106.

It is a congruent number.

It is an unprimeable number.

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, 56117 + ... + 58133.

It is an arithmetic number, because the mean of its divisors is an integer number (9011379).

Almost surely, 2^115221125 is an apocalyptic number.

It is an amenable number.

115221125 is a deficient number, since it is larger than the sum of its proper divisors (28960939).

115221125 is an equidigital number, since it uses as much as digits as its factorization.

115221125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2479 counting only the distinct ones).

The product of its digits is 200, while the sum is 20.

The square root of 115221125 is about 10734.1103497216. The cubic root of 115221125 is about 486.6059000774.

Adding to 115221125 its reverse (521122511), we get a palindrome (636343636).

The spelling of 115221125 in words is "one hundred fifteen million, two hundred twenty-one thousand, one hundred twenty-five".