265856 has 32 divisors (see below), whose sum is σ = 554880. Its totient is φ = 126720.

The previous prime is 265847. The next prime is 265861. The reversal of 265856 is 658562.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

Its product of digits (14400) is a multiple of the sum of its prime divisors (100).

It is a congruent number.

It is an unprimeable number.

265856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3935 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (17340).

2²⁶⁵⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277440).

265856 is an abundant number, since it is smaller than the sum of its proper divisors (289024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265856 is an equidigital number, since it uses as much as digits as its factorization.

265856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 100 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 265856 is about 515.6122574183. The cubic root of 265856 is about 64.3006685963.

The spelling of 265856 in words is "two hundred sixty-five thousand, eight hundred fifty-six".