115385021 has 4 divisors (see below), whose sum is σ = 115598844. Its totient is φ = 115171200.

The previous prime is 115384993. The next prime is 115385027. The reversal of 115385021 is 120583511.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85562500 + 29822521 = 9250^2 + 5461^2 .

It is a cyclic number.

It is not a de Polignac number, because 115385021 - 2⁶ = 115384957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115385027) 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, 106100 + ... + 107181.

It is an arithmetic number, because the mean of its divisors is an integer number (28899711).

Almost surely, 2^115385021 is an apocalyptic number.

It is an amenable number.

115385021 is a deficient number, since it is larger than the sum of its proper divisors (213823).

115385021 is an equidigital number, since it uses as much as digits as its factorization.

115385021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213822.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 115385021 is about 10741.7419909436. The cubic root of 115385021 is about 486.8365145466.

The spelling of 115385021 in words is "one hundred fifteen million, three hundred eighty-five thousand, twenty-one".