256746271 has 2 divisors, whose sum is σ = 256746272. Its totient is φ = 256746270.

The previous prime is 256746241. The next prime is 256746299. The reversal of 256746271 is 172647652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256746271 - 2⁹ = 256745759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256746241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128373135 + 128373136.

It is an arithmetic number, because the mean of its divisors is an integer number (128373136).

Almost surely, 2^256746271 is an apocalyptic number.

256746271 is a deficient number, since it is larger than the sum of its proper divisors (1).

256746271 is an equidigital number, since it uses as much as digits as its factorization.

256746271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 256746271 is about 16023.3039976155. The cubic root of 256746271 is about 635.5768177229.

The spelling of 256746271 in words is "two hundred fifty-six million, seven hundred forty-six thousand, two hundred seventy-one".