1121189 has 2 divisors, whose sum is σ = 1121190. Its totient is φ = 1121188.

The previous prime is 1121179. The next prime is 1121191. The reversal of 1121189 is 9811211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 588289 + 532900 = 767^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121189 - 2⁴ = 1121173 is a prime.

It is a Sophie Germain prime.

Together with 1121191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560594 + 560595.

It is an arithmetic number, because the mean of its divisors is an integer number (560595).

2^1121189 is an apocalyptic number.

It is an amenable number.

1121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121189 is an equidigital number, since it uses as much as digits as its factorization.

1121189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 23.

The square root of 1121189 is about 1058.8621251136. The cubic root of 1121189 is about 103.8866182991.

The spelling of 1121189 in words is "one million, one hundred twenty-one thousand, one hundred eighty-nine".