256266 has 24 divisors (see below), whose sum is σ = 580320. Its totient is φ = 81576.

The previous prime is 256219. The next prime is 256279. The reversal of 256266 is 662652.

256266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (24180).

2²⁵⁶²⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290160).

256266 is an abundant number, since it is smaller than the sum of its proper divisors (324054).

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

256266 is a wasteful number, since it uses less digits than its factorization.

256266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 647 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 256266 is about 506.2272217098. The cubic root of 256266 is about 63.5180265848.

It can be divided in two parts, 2562 and 66, that added together give a triangular number (2628 = T₇₂).

The spelling of 256266 in words is "two hundred fifty-six thousand, two hundred sixty-six".