565945 has 4 divisors (see below), whose sum is σ = 679140. Its totient is φ = 452752.

The previous prime is 565937. The next prime is 565973. The reversal of 565945 is 549565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549565 = 5 ⋅109913.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 346921 = 468^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 565945 - 2³ = 565937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 565945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56590 + ... + 56599.

It is an arithmetic number, because the mean of its divisors is an integer number (169785).

2⁵⁶⁵⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

565945 is a deficient number, since it is larger than the sum of its proper divisors (113195).

565945 is a wasteful number, since it uses less digits than its factorization.

565945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113194.

The product of its digits is 27000, while the sum is 34.

The square root of 565945 is about 752.2931609419. The cubic root of 565945 is about 82.7163589398.

The spelling of 565945 in words is "five hundred sixty-five thousand, nine hundred forty-five".