1198643 has 2 divisors, whose sum is σ = 1198644. Its totient is φ = 1198642.

The previous prime is 1198621. The next prime is 1198651. The reversal of 1198643 is 3468911.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3468911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1198643 - 2¹⁰ = 1197619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599321 + 599322.

It is an arithmetic number, because the mean of its divisors is an integer number (599322).

2^1198643 is an apocalyptic number.

1198643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198643 is an equidigital number, since it uses as much as digits as its factorization.

1198643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 1198643 is about 1094.8255568811. The cubic root of 1198643 is about 106.2257854854.

The spelling of 1198643 in words is "one million, one hundred ninety-eight thousand, six hundred forty-three".