321056 has 24 divisors (see below), whose sum is σ = 645120. Its totient is φ = 157248.

The previous prime is 321053. The next prime is 321073. The reversal of 321056 is 650123.

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

321056 is a modest number, since divided by 1056 gives 32 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321056.

It is not an unprimeable number, because it can be changed into a prime (321053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2465 + ... + 2591.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2³²¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

321056 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321056 is a wasteful number, since it uses less digits than its factorization.

321056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 321056 is about 566.6180371291. The cubic root of 321056 is about 68.4741941973.

Adding to 321056 its reverse (650123), we get a palindrome (971179).

The spelling of 321056 in words is "three hundred twenty-one thousand, fifty-six".