2256743 has 2 divisors, whose sum is σ = 2256744. Its totient is φ = 2256742.

The previous prime is 2256739. The next prime is 2256781. The reversal of 2256743 is 3476522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2256743 - 2² = 2256739 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁹ + 5³ + 6⁸ + 7 + 4⁴ + 3⁹ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256703) 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, 1128371 + 1128372.

It is an arithmetic number, because the mean of its divisors is an integer number (1128372).

2^2256743 is an apocalyptic number.

2256743 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256743 is an equidigital number, since it uses as much as digits as its factorization.

2256743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 29.

The square root of 2256743 is about 1502.2459851835. The cubic root of 2256743 is about 131.1678403417.

It can be divided in two parts, 22 and 56743, that added together give a palindrome (56765).

The spelling of 2256743 in words is "two million, two hundred fifty-six thousand, seven hundred forty-three".