11564005 has 4 divisors (see below), whose sum is σ = 13876812. Its totient is φ = 9251200.

The previous prime is 11563997. The next prime is 11564051. The reversal of 11564005 is 50046511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50046511 = 137 ⋅365303.

It can be written as a sum of positive squares in 2 ways, for example, as 8946081 + 2617924 = 2991^2 + 1618^2 .

It is not a de Polignac number, because 11564005 - 2³ = 11563997 is a prime.

It is a Smith number, since the sum of its digits (22) 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 a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156396 + ... + 1156405.

It is an arithmetic number, because the mean of its divisors is an integer number (3469203).

Almost surely, 2^11564005 is an apocalyptic number.

It is an amenable number.

11564005 is a deficient number, since it is larger than the sum of its proper divisors (2312807).

11564005 is an equidigital number, since it uses as much as digits as its factorization.

11564005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312806.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 11564005 is about 3400.5889195844. The cubic root of 11564005 is about 226.1358530053.

The spelling of 11564005 in words is "eleven million, five hundred sixty-four thousand, five".