115604521 has 2 divisors, whose sum is σ = 115604522. Its totient is φ = 115604520.

The previous prime is 115604513. The next prime is 115604551. The reversal of 115604521 is 125406511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74580496 + 41024025 = 8636^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 115604521 - 2³ = 115604513 is a prime.

It is not a weakly prime, because it can be changed into another prime (115604551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57802260 + 57802261.

It is an arithmetic number, because the mean of its divisors is an integer number (57802261).

Almost surely, 2^115604521 is an apocalyptic number.

It is an amenable number.

115604521 is a deficient number, since it is larger than the sum of its proper divisors (1).

115604521 is an equidigital number, since it uses as much as digits as its factorization.

115604521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 115604521 is about 10751.9542874772. The cubic root of 115604521 is about 487.1450263571.

The spelling of 115604521 in words is "one hundred fifteen million, six hundred four thousand, five hundred twenty-one".