11456591 has 4 divisors (see below), whose sum is σ = 11468184. Its totient is φ = 11445000.

The previous prime is 11456581. The next prime is 11456603. The reversal of 11456591 is 19565411.

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 11456591 - 2¹⁴ = 11440207 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 (11456551) by changing a digit.

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, 4160 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (2867046).

Almost surely, 2^11456591 is an apocalyptic number.

11456591 is a deficient number, since it is larger than the sum of its proper divisors (11593).

11456591 is a wasteful number, since it uses less digits than its factorization.

11456591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11592.

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

The square root of 11456591 is about 3384.7586324582. The cubic root of 11456591 is about 225.4335082547.

The spelling of 11456591 in words is "eleven million, four hundred fifty-six thousand, five hundred ninety-one".