256268459 has 4 divisors (see below), whose sum is σ = 256729104. Its totient is φ = 255807816.

The previous prime is 256268443. The next prime is 256268473. The reversal of 256268459 is 954862652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256268459 - 2⁴ = 256268443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256268359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229487 + ... + 230600.

It is an arithmetic number, because the mean of its divisors is an integer number (64182276).

Almost surely, 2^256268459 is an apocalyptic number.

256268459 is a deficient number, since it is larger than the sum of its proper divisors (460645).

256268459 is an equidigital number, since it uses as much as digits as its factorization.

256268459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460644.

The product of its digits is 1036800, while the sum is 47.

The square root of 256268459 is about 16008.3871454935. The cubic root of 256268459 is about 635.1822974653.

The spelling of 256268459 in words is "two hundred fifty-six million, two hundred sixty-eight thousand, four hundred fifty-nine".