259785 has 24 divisors (see below), whose sum is σ = 471744. Its totient is φ = 132000.

The previous prime is 259783. The next prime is 259801. The reversal of 259785 is 587952.

It is not a de Polignac number, because 259785 - 2¹ = 259783 is a prime.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (259781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 910 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2²⁵⁹⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

259785 is a deficient number, since it is larger than the sum of its proper divisors (211959).

259785 is a wasteful number, since it uses less digits than its factorization.

259785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 282 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 259785 is about 509.6910829120. The cubic root of 259785 is about 63.8074453368.

The spelling of 259785 in words is "two hundred fifty-nine thousand, seven hundred eighty-five".