2256287 has 12 divisors (see below), whose sum is σ = 2569560. Its totient is φ = 1977360.

The previous prime is 2256281. The next prime is 2256299. The reversal of 2256287 is 7826522.

It is not a de Polignac number, because 2256287 - 2⁸ = 2256031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256281) 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 11 ways as a sum of consecutive naturals, for example, 3188 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (214130).

2^2256287 is an apocalyptic number.

2256287 is a deficient number, since it is larger than the sum of its proper divisors (313273).

2256287 is a wasteful number, since it uses less digits than its factorization.

2256287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 683 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 2256287 is about 1502.0942047688. The cubic root of 2256287 is about 131.1590051067.

The spelling of 2256287 in words is "two million, two hundred fifty-six thousand, two hundred eighty-seven".