115128279 has 24 divisors (see below), whose sum is σ = 191434880. Its totient is φ = 65309328.

The previous prime is 115128259. The next prime is 115128313. The reversal of 115128279 is 972821511.

It is a happy number.

It is not a de Polignac number, because 115128279 - 2¹² = 115124183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115128259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2184 + ... + 15330.

Almost surely, 2^115128279 is an apocalyptic number.

115128279 is a deficient number, since it is larger than the sum of its proper divisors (76306601).

115128279 is a wasteful number, since it uses less digits than its factorization.

115128279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13299 (or 13296 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 115128279 is about 10729.7846669912. The cubic root of 115128279 is about 486.4751614588.

It can be divided in two parts, 11512 and 8279, that added together give a palindrome (19791).

The spelling of 115128279 in words is "one hundred fifteen million, one hundred twenty-eight thousand, two hundred seventy-nine".