4198321 has 2 divisors, whose sum is σ = 4198322. Its totient is φ = 4198320.

The previous prime is 4198319. The next prime is 4198331. The reversal of 4198321 is 1238914.

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., 2852721 + 1345600 = 1689^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 4198321 - 2¹ = 4198319 is a prime.

Together with 4198319, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4198321.

It is not a weakly prime, because it can be changed into another prime (4198331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2099160 + 2099161.

It is an arithmetic number, because the mean of its divisors is an integer number (2099161).

Almost surely, 2^4198321 is an apocalyptic number.

It is an amenable number.

4198321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4198321 is an equidigital number, since it uses as much as digits as its factorization.

4198321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 4198321 is about 2048.9804781891. The cubic root of 4198321 is about 161.3213621600.

The spelling of 4198321 in words is "four million, one hundred ninety-eight thousand, three hundred twenty-one".