565856 has 12 divisors (see below), whose sum is σ = 1114092. Its totient is φ = 282912.

The previous prime is 565849. The next prime is 565867. The reversal of 565856 is 658565.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8810 + ... + 8873.

It is an arithmetic number, because the mean of its divisors is an integer number (92841).

2⁵⁶⁵⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

565856 is a deficient number, since it is larger than the sum of its proper divisors (548236).

565856 is a wasteful number, since it uses less digits than its factorization.

565856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17693 (or 17685 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 565856 is about 752.2340061444. The cubic root of 565856 is about 82.7120227458.

The spelling of 565856 in words is "five hundred sixty-five thousand, eight hundred fifty-six".