2256403 has 6 divisors (see below), whose sum is σ = 2337764. Its totient is φ = 2177784.

The previous prime is 2256389. The next prime is 2256413. The reversal of 2256403 is 3046522.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2256403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 501 + ... + 2182.

2^2256403 is an apocalyptic number.

2256403 is a deficient number, since it is larger than the sum of its proper divisors (81361).

2256403 is an equidigital number, since it uses as much as digits as its factorization.

2256403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2256403 is about 1502.1328170305. The cubic root of 2256403 is about 131.1612527794.

The spelling of 2256403 in words is "two million, two hundred fifty-six thousand, four hundred three".