256825459 has 16 divisors (see below), whose sum is σ = 283481856. Its totient is φ = 230740000.

The previous prime is 256825447. The next prime is 256825463. The reversal of 256825459 is 954528652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256825459 - 2⁹ = 256824947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256825159) 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 in 15 ways as a sum of consecutive naturals, for example, 460809 + ... + 461365.

It is an arithmetic number, because the mean of its divisors is an integer number (17717616).

Almost surely, 2^256825459 is an apocalyptic number.

256825459 is a deficient number, since it is larger than the sum of its proper divisors (26656397).

256825459 is a wasteful number, since it uses less digits than its factorization.

256825459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its digits is 864000, while the sum is 46.

The square root of 256825459 is about 16025.7748330619. The cubic root of 256825459 is about 635.6421544505.

The spelling of 256825459 in words is "two hundred fifty-six million, eight hundred twenty-five thousand, four hundred fifty-nine".