256459 has 4 divisors (see below), whose sum is σ = 293104. Its totient is φ = 219816.

The previous prime is 256441. The next prime is 256469. The reversal of 256459 is 954652.

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 256459 - 2⁹ = 255947 is a prime.

256459 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 256459.

It is not an unprimeable number, because it can be changed into a prime (256469) 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, 18312 + ... + 18325.

It is an arithmetic number, because the mean of its divisors is an integer number (73276).

2²⁵⁶⁴⁵⁹ is an apocalyptic number.

256459 is a deficient number, since it is larger than the sum of its proper divisors (36645).

256459 is an equidigital number, since it uses as much as digits as its factorization.

256459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36644.

The product of its digits is 10800, while the sum is 31.

The square root of 256459 is about 506.4178116931. The cubic root of 256459 is about 63.5339682274.

The spelling of 256459 in words is "two hundred fifty-six thousand, four hundred fifty-nine".