1198291 has 2 divisors, whose sum is σ = 1198292. Its totient is φ = 1198290.

The previous prime is 1198289. The next prime is 1198297. The reversal of 1198291 is 1928911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1198291 - 2¹ = 1198289 is a prime.

Together with 1198289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1198297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599145 + 599146.

It is an arithmetic number, because the mean of its divisors is an integer number (599146).

2^1198291 is an apocalyptic number.

1198291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198291 is an equidigital number, since it uses as much as digits as its factorization.

1198291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The square root of 1198291 is about 1094.6647888737. The cubic root of 1198291 is about 106.2153861874.

The spelling of 1198291 in words is "one million, one hundred ninety-eight thousand, two hundred ninety-one".