256466 has 12 divisors (see below), whose sum is σ = 447678. Its totient is φ = 109872.

The previous prime is 256441. The next prime is 256469. The reversal of 256466 is 664652.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 108241 = 385^2 + 329^2 .

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 (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1211 + ... + 1406.

2²⁵⁶⁴⁶⁶ is an apocalyptic number.

256466 is a deficient number, since it is larger than the sum of its proper divisors (191212).

256466 is a wasteful number, since it uses less digits than its factorization.

256466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633 (or 2626 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 256466 is about 506.4247229352. The cubic root of 256466 is about 63.5345462713.

It can be divided in two parts, 25646 and 6, that added together give a palindrome (25652).

The spelling of 256466 in words is "two hundred fifty-six thousand, four hundred sixty-six".