265859 has 4 divisors (see below), whose sum is σ = 290040. Its totient is φ = 241680.

The previous prime is 265847. The next prime is 265861. The reversal of 265859 is 958562.

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

It is a cyclic number.

It is not a de Polignac number, because 265859 - 2¹⁶ = 200323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12074 + ... + 12095.

It is an arithmetic number, because the mean of its divisors is an integer number (72510).

2²⁶⁵⁸⁵⁹ is an apocalyptic number.

265859 is a deficient number, since it is larger than the sum of its proper divisors (24181).

265859 is a wasteful number, since it uses less digits than its factorization.

265859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24180.

The product of its digits is 21600, while the sum is 35.

The square root of 265859 is about 515.6151665729. The cubic root of 265859 is about 64.3009104581.

It can be divided in two parts, 26 and 5859, that added together give a palindrome (5885).

The spelling of 265859 in words is "two hundred sixty-five thousand, eight hundred fifty-nine".