1198321 has 2 divisors, whose sum is σ = 1198322. Its totient is φ = 1198320.

The previous prime is 1198303. The next prime is 1198343. The reversal of 1198321 is 1238911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 314721 = 940^2 + 561^2 .

It is an emirp because it is prime and its reverse (1238911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1198321 - 2⁵ = 1198289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599160 + 599161.

It is an arithmetic number, because the mean of its divisors is an integer number (599161).

2^1198321 is an apocalyptic number.

It is an amenable number.

1198321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198321 is an equidigital number, since it uses as much as digits as its factorization.

1198321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 1198321 is about 1094.6784916129. The cubic root of 1198321 is about 106.2162725705.

The spelling of 1198321 in words is "one million, one hundred ninety-eight thousand, three hundred twenty-one".