11465591 has 4 divisors (see below), whose sum is σ = 11472552. Its totient is φ = 11458632.

The previous prime is 11465557. The next prime is 11465593. The reversal of 11465591 is 19556411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11465591 - 2¹⁰ = 11464567 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 (11465593) 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 3 ways as a sum of consecutive naturals, for example, 536 + ... + 4818.

It is an arithmetic number, because the mean of its divisors is an integer number (2868138).

Almost surely, 2^11465591 is an apocalyptic number.

11465591 is a deficient number, since it is larger than the sum of its proper divisors (6961).

11465591 is an equidigital number, since it uses as much as digits as its factorization.

11465591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its digits is 5400, while the sum is 32.

The square root of 11465591 is about 3386.0878606439. The cubic root of 11465591 is about 225.4925243710.

The spelling of 11465591 in words is "eleven million, four hundred sixty-five thousand, five hundred ninety-one".