2256785 has 8 divisors (see below), whose sum is σ = 2724840. Its totient is φ = 1794304.

The previous prime is 2256781. The next prime is 2256791. The reversal of 2256785 is 5876522.

2256785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 1635841 = 788^2 + 1279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2256785 - 2² = 2256781 is a prime.

It is a d-powerful number, because it can be written as 2² + 2¹⁸ + 5⁴ + 6⁵ + 7³ + 8⁵ + 5⁹ .

It is not an unprimeable number, because it can be changed into a prime (2256781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 2169.

It is an arithmetic number, because the mean of its divisors is an integer number (340605).

2^2256785 is an apocalyptic number.

It is an amenable number.

2256785 is a deficient number, since it is larger than the sum of its proper divisors (468055).

2256785 is a wasteful number, since it uses less digits than its factorization.

2256785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787.

The product of its digits is 33600, while the sum is 35.

The square root of 2256785 is about 1502.2599641873. The cubic root of 2256785 is about 131.1686540535.

Subtracting from 2256785 its sum of digits (35), we obtain a triangular number (2256750 = T₂₁₂₄).

The spelling of 2256785 in words is "two million, two hundred fifty-six thousand, seven hundred eighty-five".