11566321 has 8 divisors (see below), whose sum is σ = 12488000. Its totient is φ = 10649232.

The previous prime is 11566319. The next prime is 11566337. The reversal of 11566321 is 12366511.

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 11566321 - 2¹ = 11566319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11566361) 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, 5596 + ... + 7378.

It is an arithmetic number, because the mean of its divisors is an integer number (1561000).

Almost surely, 2^11566321 is an apocalyptic number.

It is an amenable number.

11566321 is a deficient number, since it is larger than the sum of its proper divisors (921679).

11566321 is a wasteful number, since it uses less digits than its factorization.

11566321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295.

The product of its digits is 1080, while the sum is 25.

The square root of 11566321 is about 3400.9294317877. The cubic root of 11566321 is about 226.1509485734.

The spelling of 11566321 in words is "eleven million, five hundred sixty-six thousand, three hundred twenty-one".