256463 has 4 divisors (see below), whose sum is σ = 264768. Its totient is φ = 248160.

The previous prime is 256441. The next prime is 256469. The reversal of 256463 is 364652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256469) 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 in 3 ways as a sum of consecutive naturals, for example, 4106 + ... + 4167.

It is an arithmetic number, because the mean of its divisors is an integer number (66192).

2²⁵⁶⁴⁶³ is an apocalyptic number.

256463 is a deficient number, since it is larger than the sum of its proper divisors (8305).

256463 is an equidigital number, since it uses as much as digits as its factorization.

256463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304.

The product of its digits is 4320, while the sum is 26.

The square root of 256463 is about 506.4217609858. The cubic root of 256463 is about 63.5342985395.

It can be divided in two parts, 2 and 56463, that added together give a palindrome (56465).

The spelling of 256463 in words is "two hundred fifty-six thousand, four hundred sixty-three".