256622 has 4 divisors (see below), whose sum is σ = 384936. Its totient is φ = 128310.

The previous prime is 256609. The next prime is 256639. The reversal of 256622 is 226652.

It is a happy number.

256622 is nontrivially palindromic in base 7.

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

It is a congruent number.

It is an unprimeable number.

256622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64154 + ... + 64157.

It is an arithmetic number, because the mean of its divisors is an integer number (96234).

2²⁵⁶⁶²² is an apocalyptic number.

256622 is a deficient number, since it is larger than the sum of its proper divisors (128314).

256622 is a wasteful number, since it uses less digits than its factorization.

256622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128313.

The product of its digits is 1440, while the sum is 23.

The square root of 256622 is about 506.5787204374. The cubic root of 256622 is about 63.5474256657.

It can be divided in two parts, 256 and 622, that added together give a palindrome (878).

The spelling of 256622 in words is "two hundred fifty-six thousand, six hundred twenty-two".