1198187 has 2 divisors, whose sum is σ = 1198188. Its totient is φ = 1198186.

The previous prime is 1198157. The next prime is 1198189. The reversal of 1198187 is 7818911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1198187 - 2⁶ = 1198123 is a prime.

Together with 1198189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1198189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599093 + 599094.

It is an arithmetic number, because the mean of its divisors is an integer number (599094).

2^1198187 is an apocalyptic number.

1198187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198187 is an equidigital number, since it uses as much as digits as its factorization.

1198187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 35.

The square root of 1198187 is about 1094.6172847164. The cubic root of 1198187 is about 106.2123132778.

The spelling of 1198187 in words is "one million, one hundred ninety-eight thousand, one hundred eighty-seven".