11566201 has 2 divisors, whose sum is σ = 11566202. Its totient is φ = 11566200.

The previous prime is 11566199. The next prime is 11566207. The reversal of 11566201 is 10266511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7952400 + 3613801 = 2820^2 + 1901^2 .

It is an emirp because it is prime and its reverse (10266511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11566201 - 2¹ = 11566199 is a prime.

Together with 11566199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11566207) 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 as a sum of consecutive naturals, namely, 5783100 + 5783101.

It is an arithmetic number, because the mean of its divisors is an integer number (5783101).

Almost surely, 2^11566201 is an apocalyptic number.

It is an amenable number.

11566201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566201 is an equidigital number, since it uses as much as digits as its factorization.

11566201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11566201 is about 3400.9117895059. The cubic root of 11566201 is about 226.1501664692.

The spelling of 11566201 in words is "eleven million, five hundred sixty-six thousand, two hundred one".