115603865 has 32 divisors (see below), whose sum is σ = 158941440. Its totient is φ = 80061696.

The previous prime is 115603861. The next prime is 115603871. The reversal of 115603865 is 568306511.

It is not a de Polignac number, because 115603865 - 2² = 115603861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115603861) 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 31 ways as a sum of consecutive naturals, for example, 78506 + ... + 79964.

It is an arithmetic number, because the mean of its divisors is an integer number (4966920).

Almost surely, 2^115603865 is an apocalyptic number.

It is an amenable number.

115603865 is a deficient number, since it is larger than the sum of its proper divisors (43337575).

115603865 is a wasteful number, since it uses less digits than its factorization.

115603865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 115603865 is about 10751.9237813519. The cubic root of 115603865 is about 487.1441049175.

The spelling of 115603865 in words is "one hundred fifteen million, six hundred three thousand, eight hundred sixty-five".