115800865 has 4 divisors (see below), whose sum is σ = 138961044. Its totient is φ = 92640688.

The previous prime is 115800847. The next prime is 115800869. The reversal of 115800865 is 568008511.

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 12737761 + 103063104 = 3569^2 + 10152^2 .

It is a cyclic number.

It is not a de Polignac number, because 115800865 - 2⁵ = 115800833 is a prime.

It is a super-3 number, since 3×115800865³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115800865.

It is not an unprimeable number, because it can be changed into a prime (115800869) 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, 11580082 + ... + 11580091.

It is an arithmetic number, because the mean of its divisors is an integer number (34740261).

Almost surely, 2^115800865 is an apocalyptic number.

It is an amenable number.

115800865 is a deficient number, since it is larger than the sum of its proper divisors (23160179).

115800865 is an equidigital number, since it uses as much as digits as its factorization.

115800865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23160178.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 115800865 is about 10761.0810330561. The cubic root of 115800865 is about 487.4206612065.

The spelling of 115800865 in words is "one hundred fifteen million, eight hundred thousand, eight hundred sixty-five".