321304 has 8 divisors (see below), whose sum is σ = 602460. Its totient is φ = 160648.

The previous prime is 321301. The next prime is 321311. The reversal of 321304 is 403123.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20074 + ... + 20089.

2³²¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

321304 is a deficient number, since it is larger than the sum of its proper divisors (281156).

321304 is a wasteful number, since it uses less digits than its factorization.

321304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40169 (or 40165 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 321304 is about 566.8368371939. The cubic root of 321304 is about 68.4918206441.

Adding to 321304 its reverse (403123), we get a palindrome (724427).

It can be divided in two parts, 321 and 304, that added together give a 4-th power (625 = 5⁴).

The spelling of 321304 in words is "three hundred twenty-one thousand, three hundred four", and thus it is an iban number.