256967 has 2 divisors, whose sum is σ = 256968. Its totient is φ = 256966.

The previous prime is 256957. The next prime is 256981. The reversal of 256967 is 769652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256967 - 2⁶ = 256903 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256967.

It is not a weakly prime, because it can be changed into another prime (256957) 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, 128483 + 128484.

It is an arithmetic number, because the mean of its divisors is an integer number (128484).

2²⁵⁶⁹⁶⁷ is an apocalyptic number.

256967 is a deficient number, since it is larger than the sum of its proper divisors (1).

256967 is an equidigital number, since it uses as much as digits as its factorization.

256967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 256967 is about 506.9191256996. The cubic root of 256967 is about 63.5758904173.

The spelling of 256967 in words is "two hundred fifty-six thousand, nine hundred sixty-seven".