404321 has 2 divisors, whose sum is σ = 404322. Its totient is φ = 404320.

The previous prime is 404309. The next prime is 404323. The reversal of 404321 is 123404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211600 + 192721 = 460^2 + 439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404321 is a prime.

Together with 404323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 404296 and 404305.

It is not a weakly prime, because it can be changed into another prime (404323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202160 + 202161.

It is an arithmetic number, because the mean of its divisors is an integer number (202161).

2⁴⁰⁴³²¹ is an apocalyptic number.

It is an amenable number.

404321 is a deficient number, since it is larger than the sum of its proper divisors (1).

404321 is an equidigital number, since it uses as much as digits as its factorization.

404321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 404321 is about 635.8624065000. The cubic root of 404321 is about 73.9449919906.

Adding to 404321 its reverse (123404), we get a palindrome (527725).

The spelling of 404321 in words is "four hundred four thousand, three hundred twenty-one", and thus it is an iban number.