115809825 has 12 divisors (see below), whose sum is σ = 191472368. Its totient is φ = 61765200.

The previous prime is 115809821. The next prime is 115809829. The reversal of 115809825 is 528908511.

It is an interprime number because it is at equal distance from previous prime (115809821) and next prime (115809829).

It is not a de Polignac number, because 115809825 - 2² = 115809821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115809821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771991 + ... + 772140.

Almost surely, 2^115809825 is an apocalyptic number.

115809825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115809825 is a deficient number, since it is larger than the sum of its proper divisors (75662543).

115809825 is a wasteful number, since it uses less digits than its factorization.

115809825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544144 (or 1544139 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 39.

The square root of 115809825 is about 10761.4973400545. The cubic root of 115809825 is about 487.4332321445.

The spelling of 115809825 in words is "one hundred fifteen million, eight hundred nine thousand, eight hundred twenty-five".