407321 has 2 divisors, whose sum is σ = 407322. Its totient is φ = 407320.

The previous prime is 407317. The next prime is 407347. The reversal of 407321 is 123704.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403225 + 4096 = 635^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 407321 - 2² = 407317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 407321.

It is not a weakly prime, because it can be changed into another prime (407311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203660 + 203661.

It is an arithmetic number, because the mean of its divisors is an integer number (203661).

2⁴⁰⁷³²¹ is an apocalyptic number.

It is an amenable number.

407321 is a deficient number, since it is larger than the sum of its proper divisors (1).

407321 is an equidigital number, since it uses as much as digits as its factorization.

407321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 407321 is about 638.2170477197. The cubic root of 407321 is about 74.1274283600.

The spelling of 407321 in words is "four hundred seven thousand, three hundred twenty-one", and thus it is an iban number.