11164591 has 4 divisors (see below), whose sum is σ = 11650032. Its totient is φ = 10679152.

The previous prime is 11164567. The next prime is 11164607. The reversal of 11164591 is 19546111.

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 11164591 - 2⁷ = 11164463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11164501) 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, 242686 + ... + 242731.

It is an arithmetic number, because the mean of its divisors is an integer number (2912508).

Almost surely, 2^11164591 is an apocalyptic number.

11164591 is a deficient number, since it is larger than the sum of its proper divisors (485441).

11164591 is an equidigital number, since it uses as much as digits as its factorization.

11164591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485440.

The product of its digits is 1080, while the sum is 28.

The square root of 11164591 is about 3341.3456869950. The cubic root of 11164591 is about 223.5017558297.

The spelling of 11164591 in words is "eleven million, one hundred sixty-four thousand, five hundred ninety-one".