259805 has 16 divisors (see below), whose sum is σ = 384384. Its totient is φ = 164160.

The previous prime is 259801. The next prime is 259813. The reversal of 259805 is 508952.

It is not a de Polignac number, because 259805 - 2² = 259801 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (24024).

2²⁵⁹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

259805 is a deficient number, since it is larger than the sum of its proper divisors (124579).

259805 is a wasteful number, since it uses less digits than its factorization.

259805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 259805 is about 509.7107022616. The cubic root of 259805 is about 63.8090827371.

The spelling of 259805 in words is "two hundred fifty-nine thousand, eight hundred five".