11575865 has 32 divisors (see below), whose sum is σ = 16809984. Its totient is φ = 7485120.

The previous prime is 11575853. The next prime is 11575867. The reversal of 11575865 is 56857511.

It is a happy number.

It is not a de Polignac number, because 11575865 - 2⁴ = 11575849 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11575867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50882 + ... + 51108.

It is an arithmetic number, because the mean of its divisors is an integer number (525312).

Almost surely, 2^11575865 is an apocalyptic number.

It is an amenable number.

11575865 is a deficient number, since it is larger than the sum of its proper divisors (5234119).

11575865 is a wasteful number, since it uses less digits than its factorization.

11575865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 42000, while the sum is 38.

The square root of 11575865 is about 3402.3322882987. The cubic root of 11575865 is about 226.2131346180.

The spelling of 11575865 in words is "eleven million, five hundred seventy-five thousand, eight hundred sixty-five".