115604021 has 8 divisors (see below), whose sum is σ = 127861944. Its totient is φ = 103826880.

The previous prime is 115603979. The next prime is 115604023. The reversal of 115604021 is 120406511.

It can be written as a sum of positive squares in 4 ways, for example, as 20151121 + 95452900 = 4489^2 + 9770^2 .

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 115604021 - 2¹⁰ = 115602997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115603984 and 115604002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115604023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119690 + ... + 120651.

It is an arithmetic number, because the mean of its divisors is an integer number (15982743).

Almost surely, 2^115604021 is an apocalyptic number.

It is an amenable number.

115604021 is a deficient number, since it is larger than the sum of its proper divisors (12257923).

115604021 is a wasteful number, since it uses less digits than its factorization.

115604021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240391.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 115604021 is about 10751.9310358651. The cubic root of 115604021 is about 487.1443240407.

The spelling of 115604021 in words is "one hundred fifteen million, six hundred four thousand, twenty-one".