565505 has 8 divisors (see below), whose sum is σ = 718632. Its totient is φ = 425728.

The previous prime is 565489. The next prime is 565507. The reversal of 565505 is 505565.

It is a Cunningham number, because it is equal to 752²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 552049 = 116^2 + 743^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 565505 - 2⁴ = 565489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565505.

It is not an unprimeable number, because it can be changed into a prime (565507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3242 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (89829).

2⁵⁶⁵⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

565505 is a deficient number, since it is larger than the sum of its proper divisors (153127).

565505 is a wasteful number, since it uses less digits than its factorization.

565505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 565505 is about 752.0006648933. Note that the first 3 decimals coincide. The cubic root of 565505 is about 82.6949171425.

The spelling of 565505 in words is "five hundred sixty-five thousand, five hundred five".