11565023 has 4 divisors (see below), whose sum is σ = 11592288. Its totient is φ = 11537760.

The previous prime is 11565017. The next prime is 11565031. The reversal of 11565023 is 32056511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11565023 - 2²² = 7370719 is a prime.

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 11565023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565823) 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, 12986 + ... + 13847.

It is an arithmetic number, because the mean of its divisors is an integer number (2898072).

Almost surely, 2^11565023 is an apocalyptic number.

11565023 is a deficient number, since it is larger than the sum of its proper divisors (27265).

11565023 is an equidigital number, since it uses as much as digits as its factorization.

11565023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27264.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 11565023 is about 3400.7385962464. The cubic root of 11565023 is about 226.1424885249.

The spelling of 11565023 in words is "eleven million, five hundred sixty-five thousand, twenty-three".