2256571 has 2 divisors, whose sum is σ = 2256572. Its totient is φ = 2256570.

The previous prime is 2256559. The next prime is 2256601. The reversal of 2256571 is 1756522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2256571 - 2⁵ = 2256539 is a prime.

It is a super-2 number, since 2×2256571² = 10184225356082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2257571) 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 as a sum of consecutive naturals, namely, 1128285 + 1128286.

It is an arithmetic number, because the mean of its divisors is an integer number (1128286).

2^2256571 is an apocalyptic number.

2256571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256571 is an equidigital number, since it uses as much as digits as its factorization.

2256571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 2256571 is about 1502.1887364775. The cubic root of 2256571 is about 131.1645078929.

The spelling of 2256571 in words is "two million, two hundred fifty-six thousand, five hundred seventy-one".