321716 has 6 divisors (see below), whose sum is σ = 563010. Its totient is φ = 160856.

The previous prime is 321709. The next prime is 321721. The reversal of 321716 is 617123.

It is a happy number.

321716 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 only one way, i.e., 206116 + 115600 = 454^2 + 340^2 .

It is a congruent number.

It is an unprimeable number.

321716 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, 40211 + ... + 40218.

It is an arithmetic number, because the mean of its divisors is an integer number (93835).

2³²¹⁷¹⁶ is an apocalyptic number.

It is an amenable number.

321716 is a deficient number, since it is larger than the sum of its proper divisors (241294).

321716 is a wasteful number, since it uses less digits than its factorization.

321716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80433 (or 80431 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 321716 is about 567.2001410437. The cubic root of 321716 is about 68.5210832504.

Adding to 321716 its reverse (617123), we get a palindrome (938839).

The spelling of 321716 in words is "three hundred twenty-one thousand, seven hundred sixteen".