256279 has 2 divisors, whose sum is σ = 256280. Its totient is φ = 256278.

The previous prime is 256219. The next prime is 256301. The reversal of 256279 is 972652.

256279 is nontrivially palindromic in base 7.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256279 - 2⁹ = 255767 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2 + 5⁷ + 2¹⁷ + 6⁶ + 7³ + 9² .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 256279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128139 + 128140.

It is an arithmetic number, because the mean of its divisors is an integer number (128140).

2²⁵⁶²⁷⁹ is an apocalyptic number.

256279 is a deficient number, since it is larger than the sum of its proper divisors (1).

256279 is an equidigital number, since it uses as much as digits as its factorization.

256279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 256279 is about 506.2400616308. The cubic root of 256279 is about 63.5191006256.

It can be divided in two parts, 256 and 279, that added together give a palindrome (535).

The spelling of 256279 in words is "two hundred fifty-six thousand, two hundred seventy-nine".