568561 has 4 divisors (see below), whose sum is σ = 649792. Its totient is φ = 487332.

The previous prime is 568549. The next prime is 568577. The reversal of 568561 is 165865.

568561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 568561 - 2⁷ = 568433 is a prime.

It is a super-2 number, since 2×568561² = 646523221442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40605 + ... + 40618.

It is an arithmetic number, because the mean of its divisors is an integer number (162448).

2⁵⁶⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

568561 is a deficient number, since it is larger than the sum of its proper divisors (81231).

568561 is an equidigital number, since it uses as much as digits as its factorization.

568561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81230.

The product of its digits is 7200, while the sum is 31.

The square root of 568561 is about 754.0298402583. The cubic root of 568561 is about 82.8436112606.

The spelling of 568561 in words is "five hundred sixty-eight thousand, five hundred sixty-one".