565951 has 4 divisors (see below), whose sum is σ = 572400. Its totient is φ = 559504.

The previous prime is 565937. The next prime is 565973. The reversal of 565951 is 159565.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 565951 - 2⁵ = 565919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3091 + ... + 3268.

It is an arithmetic number, because the mean of its divisors is an integer number (143100).

2⁵⁶⁵⁹⁵¹ is an apocalyptic number.

565951 is a deficient number, since it is larger than the sum of its proper divisors (6449).

565951 is an equidigital number, since it uses as much as digits as its factorization.

565951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448.

The product of its digits is 6750, while the sum is 31.

The square root of 565951 is about 752.2971487384. The cubic root of 565951 is about 82.7166512511.

It can be divided in two parts, 5 and 65951, that added together give a palindrome (65956).

The spelling of 565951 in words is "five hundred sixty-five thousand, nine hundred fifty-one".