11564491 has 8 divisors (see below), whose sum is σ = 11880000. Its totient is φ = 11251968.

The previous prime is 11564479. The next prime is 11564503. The reversal of 11564491 is 19446511.

It is an interprime number because it is at equal distance from previous prime (11564479) and next prime (11564503).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11564491 - 2⁵ = 11564459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11564191) 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 7 ways as a sum of consecutive naturals, for example, 8635 + ... + 9883.

It is an arithmetic number, because the mean of its divisors is an integer number (1485000).

Almost surely, 2^11564491 is an apocalyptic number.

11564491 is a deficient number, since it is larger than the sum of its proper divisors (315509).

11564491 is a wasteful number, since it uses less digits than its factorization.

11564491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493.

The product of its digits is 4320, while the sum is 31.

The square root of 11564491 is about 3400.6603770444. The cubic root of 11564491 is about 226.1390208952.

The spelling of 11564491 in words is "eleven million, five hundred sixty-four thousand, four hundred ninety-one".