321712 has 10 divisors (see below), whose sum is σ = 623348. Its totient is φ = 160848.

The previous prime is 321709. The next prime is 321721. The reversal of 321712 is 217123.

It is a happy number.

321712 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×321712² = 206997221888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 20107 = 321712 / (3 + 2 + 1 + 7 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038 + ... + 10069.

2³²¹⁷¹² is an apocalyptic number.

It is an amenable number.

321712 is a deficient number, since it is larger than the sum of its proper divisors (301636).

321712 is a wasteful number, since it uses less digits than its factorization.

321712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115 (or 20109 counting only the distinct ones).

The product of its digits is 84, while the sum is 16.

The square root of 321712 is about 567.1966149405. The cubic root of 321712 is about 68.5207992676.

Adding to 321712 its reverse (217123), we get a palindrome (538835).

The spelling of 321712 in words is "three hundred twenty-one thousand, seven hundred twelve", and thus it is an iban number.