321256 has 16 divisors (see below), whose sum is σ = 648900. Its totient is φ = 148224.

The previous prime is 321247. The next prime is 321289. The reversal of 321256 is 652123.

It is a happy number.

321256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 900 = 566^2 + 30^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441 + ... + 1648.

2³²¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

321256 is an abundant number, since it is smaller than the sum of its proper divisors (327644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321256 is a wasteful number, since it uses less digits than its factorization.

321256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108 (or 3104 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 321256 is about 566.7944953861. The cubic root of 321256 is about 68.4884097818.

Adding to 321256 its reverse (652123), we get a palindrome (973379).

It can be divided in two parts, 32125 and 6, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 321256 in words is "three hundred twenty-one thousand, two hundred fifty-six".