11565371 has 2 divisors, whose sum is σ = 11565372. Its totient is φ = 11565370.

The previous prime is 11565347. The next prime is 11565373. The reversal of 11565371 is 17356511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11565371 - 2¹⁴ = 11548987 is a prime.

Together with 11565373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11565373) 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, 5782685 + 5782686.

It is an arithmetic number, because the mean of its divisors is an integer number (5782686).

Almost surely, 2^11565371 is an apocalyptic number.

11565371 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565371 is an equidigital number, since it uses as much as digits as its factorization.

11565371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 29.

The square root of 11565371 is about 3400.7897612172. The cubic root of 11565371 is about 226.1447567664.

The spelling of 11565371 in words is "eleven million, five hundred sixty-five thousand, three hundred seventy-one".