565897 has 4 divisors (see below), whose sum is σ = 575236. Its totient is φ = 556560.

The previous prime is 565891. The next prime is 565907. The reversal of 565897 is 798565.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 355216 = 459^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 565897 - 2³ = 565889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565891) 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, 4578 + ... + 4699.

It is an arithmetic number, because the mean of its divisors is an integer number (143809).

2⁵⁶⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

565897 is a deficient number, since it is larger than the sum of its proper divisors (9339).

565897 is an equidigital number, since it uses as much as digits as its factorization.

565897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9338.

The product of its digits is 75600, while the sum is 40.

The square root of 565897 is about 752.2612578087. The cubic root of 565897 is about 82.7140203748.

The spelling of 565897 in words is "five hundred sixty-five thousand, eight hundred ninety-seven".