256886459 has 2 divisors, whose sum is σ = 256886460. Its totient is φ = 256886458.

The previous prime is 256886417. The next prime is 256886501. The reversal of 256886459 is 954688652.

It is a balanced prime because it is at equal distance from previous prime (256886417) and next prime (256886501).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256886459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256886459.

It is not a weakly prime, because it can be changed into another prime (256886159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128443229 + 128443230.

It is an arithmetic number, because the mean of its divisors is an integer number (128443230).

Almost surely, 2^256886459 is an apocalyptic number.

256886459 is a deficient number, since it is larger than the sum of its proper divisors (1).

256886459 is an equidigital number, since it uses as much as digits as its factorization.

256886459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 53.

The square root of 256886459 is about 16027.6779041756. The cubic root of 256886459 is about 635.6924753989.

The spelling of 256886459 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, four hundred fifty-nine".