115428187 has 4 divisors (see below), whose sum is σ = 131917936. Its totient is φ = 98938440.

The previous prime is 115428163. The next prime is 115428217. The reversal of 115428187 is 781824511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115428187 - 2¹¹ = 115426139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115428107) 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, 8244864 + ... + 8244877.

It is an arithmetic number, because the mean of its divisors is an integer number (32979484).

Almost surely, 2^115428187 is an apocalyptic number.

115428187 is a deficient number, since it is larger than the sum of its proper divisors (16489749).

115428187 is an equidigital number, since it uses as much as digits as its factorization.

115428187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16489748.

The product of its digits is 17920, while the sum is 37.

The square root of 115428187 is about 10743.7510674810. The cubic root of 115428187 is about 486.8972161431.

The spelling of 115428187 in words is "one hundred fifteen million, four hundred twenty-eight thousand, one hundred eighty-seven".