2566256 has 40 divisors (see below), whose sum is σ = 6201984. Its totient is φ = 999360.

The previous prime is 2566253. The next prime is 2566259. The reversal of 2566256 is 6526652.

It is an interprime number because it is at equal distance from previous prime (2566253) and next prime (2566259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 2273.

2^2566256 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 2566256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3100992).

2566256 is an abundant number, since it is smaller than the sum of its proper divisors (3635728).

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

2566256 is a wasteful number, since it uses less digits than its factorization.

2566256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2103 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 2566256 is about 1601.9538070743. The cubic root of 2566256 is about 136.9094185179.

The spelling of 2566256 in words is "two million, five hundred sixty-six thousand, two hundred fifty-six".