11565056 has 24 divisors (see below), whose sum is σ = 23128560. Its totient is φ = 5781504.

The previous prime is 11565041. The next prime is 11565061. The reversal of 11565056 is 65056511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (963690).

Almost surely, 2^11565056 is an apocalyptic number.

11565056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11565056 is a deficient number, since it is larger than the sum of its proper divisors (11563504).

11565056 is an frugal number, since it uses more digits than its factorization.

11565056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669 (or 5649 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 11565056 is about 3400.7434481301. The cubic root of 11565056 is about 226.1427036187.

It can be divided in two parts, 1156505 and 6, that added together give a palindrome (1156511).

The spelling of 11565056 in words is "eleven million, five hundred sixty-five thousand, fifty-six".