565091 has 4 divisors (see below), whose sum is σ = 567384. Its totient is φ = 562800.

The previous prime is 565069. The next prime is 565109. The reversal of 565091 is 190565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190565 = 5 ⋅38113.

It is a cyclic number.

It is not a de Polignac number, because 565091 - 2¹⁴ = 548707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 565091.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565091.

It is not an unprimeable number, because it can be changed into a prime (565391) 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, 725 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (141846).

2⁵⁶⁵⁰⁹¹ is an apocalyptic number.

565091 is a deficient number, since it is larger than the sum of its proper divisors (2293).

565091 is a wasteful number, since it uses less digits than its factorization.

565091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 565091 is about 751.7253487811. The cubic root of 565091 is about 82.6747322024.

The spelling of 565091 in words is "five hundred sixty-five thousand, ninety-one".