115520657 has 8 divisors (see below), whose sum is σ = 135244032. Its totient is φ = 96602400.

The previous prime is 115520633. The next prime is 115520677. The reversal of 115520657 is 756025511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115520657 - 2²⁴ = 98743441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115520677) 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 7 ways as a sum of consecutive naturals, for example, 200969 + ... + 201542.

It is an arithmetic number, because the mean of its divisors is an integer number (16905504).

Almost surely, 2^115520657 is an apocalyptic number.

It is an amenable number.

115520657 is a deficient number, since it is larger than the sum of its proper divisors (19723375).

115520657 is an equidigital number, since it uses as much as digits as its factorization.

115520657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402559.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 115520657 is about 10748.0536377523. The cubic root of 115520657 is about 487.0271998998.

It can be divided in two parts, 1155 and 20657, that added together give a palindrome (21812).

The spelling of 115520657 in words is "one hundred fifteen million, five hundred twenty thousand, six hundred fifty-seven".