565961 has 8 divisors (see below), whose sum is σ = 644544. Its totient is φ = 491920.

The previous prime is 565937. The next prime is 565973. The reversal of 565961 is 169565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 565961 - 2¹⁰ = 564937 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (80568).

2⁵⁶⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

565961 is a deficient number, since it is larger than the sum of its proper divisors (78583).

565961 is a wasteful number, since it uses less digits than its factorization.

565961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its digits is 8100, while the sum is 32.

The square root of 565961 is about 752.3037950190. The cubic root of 565961 is about 82.7171384321.

The spelling of 565961 in words is "five hundred sixty-five thousand, nine hundred sixty-one".