321602 has 6 divisors (see below), whose sum is σ = 483609. Its totient is φ = 160400.

The previous prime is 321593. The next prime is 321611. The reversal of 321602 is 206123.

It is an interprime number because it is at equal distance from previous prime (321593) and next prime (321611).

It can be written as a sum of positive squares in 2 ways, for example, as 192721 + 128881 = 439^2 + 359^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=401.

It is a Duffinian number.

It is an unprimeable number.

321602 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 2 ways as a sum of consecutive naturals, for example, 602 + ... + 1002.

2³²¹⁶⁰² is an apocalyptic number.

321602 is a deficient number, since it is larger than the sum of its proper divisors (162007).

321602 is an frugal number, since it uses more digits than its factorization.

321602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 321602 is about 567.0996385116. The cubic root of 321602 is about 68.5129888169.

Multiplying 321602 by its product of nonzero digits (72), we get a square (23155344 = 4812²).

Adding to 321602 its reverse (206123), we get a palindrome (527725).

The spelling of 321602 in words is "three hundred twenty-one thousand, six hundred two".