115389121 has 4 divisors (see below), whose sum is σ = 116467632. Its totient is φ = 114310612.

The previous prime is 115389107. The next prime is 115389133. The reversal of 115389121 is 121983511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115389121 - 2¹⁷ = 115258049 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115389101) 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, 539095 + ... + 539308.

It is an arithmetic number, because the mean of its divisors is an integer number (29116908).

Almost surely, 2^115389121 is an apocalyptic number.

It is an amenable number.

115389121 is a deficient number, since it is larger than the sum of its proper divisors (1078511).

115389121 is a wasteful number, since it uses less digits than its factorization.

115389121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078510.

The product of its digits is 2160, while the sum is 31.

The square root of 115389121 is about 10741.9328335267. The cubic root of 115389121 is about 486.8422807661.

The spelling of 115389121 in words is "one hundred fifteen million, three hundred eighty-nine thousand, one hundred twenty-one".