259565 has 4 divisors (see below), whose sum is σ = 311484. Its totient is φ = 207648.

The previous prime is 259547. The next prime is 259577. The reversal of 259565 is 565952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104329 + 155236 = 323^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 259565 - 2⁸ = 259309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 25952 + ... + 25961.

It is an arithmetic number, because the mean of its divisors is an integer number (77871).

2²⁵⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

259565 is a deficient number, since it is larger than the sum of its proper divisors (51919).

259565 is an equidigital number, since it uses as much as digits as its factorization.

259565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51918.

The product of its digits is 13500, while the sum is 32.

The square root of 259565 is about 509.4752202021. The cubic root of 259565 is about 63.7894283837.

The spelling of 259565 in words is "two hundred fifty-nine thousand, five hundred sixty-five".