2259866 has 16 divisors (see below), whose sum is σ = 3903360. Its totient is φ = 961200.

The previous prime is 2259863. The next prime is 2259871. The reversal of 2259866 is 6689522.

2259866 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2⁴ + 2¹¹ + 5² + 9⁶ + 8² + 6⁶ + 6⁸ .

2259866 is strictly pandigital in base 8.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2259863) 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, 1580 + ... + 2648.

It is an arithmetic number, because the mean of its divisors is an integer number (243960).

2^2259866 is an apocalyptic number.

2259866 is a deficient number, since it is larger than the sum of its proper divisors (1643494).

2259866 is a wasteful number, since it uses less digits than its factorization.

2259866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229.

The product of its digits is 51840, while the sum is 38.

The square root of 2259866 is about 1503.2850694396. The cubic root of 2259866 is about 131.2283181116.

It can be divided in two parts, 2259 and 866, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2259866 in words is "two million, two hundred fifty-nine thousand, eight hundred sixty-six".