321956 has 6 divisors (see below), whose sum is σ = 563430. Its totient is φ = 160976.

The previous prime is 321949. The next prime is 321961. The reversal of 321956 is 659123.

It can be written as a sum of positive squares in only one way, i.e., 320356 + 1600 = 566^2 + 40^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321956.

It is an unprimeable number.

321956 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, 40241 + ... + 40248.

It is an arithmetic number, because the mean of its divisors is an integer number (93905).

2³²¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

321956 is a deficient number, since it is larger than the sum of its proper divisors (241474).

321956 is a wasteful number, since it uses less digits than its factorization.

321956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80493 (or 80491 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 321956 is about 567.4116671342. The cubic root of 321956 is about 68.5381179149.

The spelling of 321956 in words is "three hundred twenty-one thousand, nine hundred fifty-six".