321307 has 8 divisors (see below), whose sum is σ = 370656. Its totient is φ = 272832.

The previous prime is 321301. The next prime is 321311. The reversal of 321307 is 703123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321307 - 2¹¹ = 319259 is a prime.

It is a Duffinian number.

321307 is a lucky number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263 + ... + 1495.

It is an arithmetic number, because the mean of its divisors is an integer number (46332).

2³²¹³⁰⁷ is an apocalyptic number.

321307 is a deficient number, since it is larger than the sum of its proper divisors (49349).

321307 is a wasteful number, since it uses less digits than its factorization.

321307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 321307 is about 566.8394834519. The cubic root of 321307 is about 68.4920338117.

The spelling of 321307 in words is "three hundred twenty-one thousand, three hundred seven", and thus it is an iban number.