565556 has 12 divisors (see below), whose sum is σ = 1048068. Its totient is φ = 266112.

The previous prime is 565553. The next prime is 565559. The reversal of 565556 is 655565.

It is an interprime number because it is at equal distance from previous prime (565553) and next prime (565559).

It can be written as a sum of positive squares in 2 ways, for example, as 512656 + 52900 = 716^2 + 230^2 .

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565553) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4091 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (87339).

2⁵⁶⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

565556 is a deficient number, since it is larger than the sum of its proper divisors (482512).

565556 is a wasteful number, since it uses less digits than its factorization.

565556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338 (or 8336 counting only the distinct ones).

The product of its digits is 22500, while the sum is 32.

The square root of 565556 is about 752.0345736733. The cubic root of 565556 is about 82.6974030115.

Subtracting 565556 from its reverse (655565), we obtain a palindrome (90009).

The spelling of 565556 in words is "five hundred sixty-five thousand, five hundred fifty-six".