259885 has 4 divisors (see below), whose sum is σ = 311868. Its totient is φ = 207904.

The previous prime is 259867. The next prime is 259907. The reversal of 259885 is 588952.

It is a happy number.

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 148996 + 110889 = 386^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 259885 - 2¹¹ = 257837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25984 + ... + 25993.

It is an arithmetic number, because the mean of its divisors is an integer number (77967).

2²⁵⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

259885 is a deficient number, since it is larger than the sum of its proper divisors (51983).

259885 is an equidigital number, since it uses as much as digits as its factorization.

259885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51982.

The product of its digits is 28800, while the sum is 37.

The square root of 259885 is about 509.7891721094. The cubic root of 259885 is about 63.8156314984.

The spelling of 259885 in words is "two hundred fifty-nine thousand, eight hundred eighty-five".