2255866 has 16 divisors (see below), whose sum is σ = 3668544. Its totient is φ = 1036224.

The previous prime is 2255837. The next prime is 2255867. The reversal of 2255866 is 6685522.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a d-powerful number, because it can be written as 2¹¹ + 2¹⁹ + 5³ + 5⁵ + 8 + 6⁶ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (2255867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (229284).

2^2255866 is an apocalyptic number.

2255866 is a deficient number, since it is larger than the sum of its proper divisors (1412678).

2255866 is a wasteful number, since it uses less digits than its factorization.

2255866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605.

The product of its digits is 28800, while the sum is 34.

The square root of 2255866 is about 1501.9540605491. The cubic root of 2255866 is about 131.1508469578.

The spelling of 2255866 in words is "two million, two hundred fifty-five thousand, eight hundred sixty-six".