115387491 has 16 divisors (see below), whose sum is σ = 162547200. Its totient is φ = 72689568.

The previous prime is 115387477. The next prime is 115387499. The reversal of 115387491 is 194783511.

It is a de Polignac number, because none of the positive numbers 2^k-115387491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115387499) 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, 10021 + ... + 18198.

It is an arithmetic number, because the mean of its divisors is an integer number (10159200).

Almost surely, 2^115387491 is an apocalyptic number.

115387491 is a deficient number, since it is larger than the sum of its proper divisors (47159709).

115387491 is a wasteful number, since it uses less digits than its factorization.

115387491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28298.

The product of its digits is 30240, while the sum is 39.

The square root of 115387491 is about 10741.8569623692. The cubic root of 115387491 is about 486.8399883586.

The spelling of 115387491 in words is "one hundred fifteen million, three hundred eighty-seven thousand, four hundred ninety-one".