1128089 has 2 divisors, whose sum is σ = 1128090. Its totient is φ = 1128088.

The previous prime is 1128037. The next prime is 1128091. The reversal of 1128089 is 9808211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 4489 = 1060^2 + 67^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128089 is a prime.

It is a Sophie Germain prime.

Together with 1128091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1128289) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564044 + 564045.

It is an arithmetic number, because the mean of its divisors is an integer number (564045).

2^1128089 is an apocalyptic number.

It is an amenable number.

1128089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128089 is an equidigital number, since it uses as much as digits as its factorization.

1128089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1128089 is about 1062.1153421357. The cubic root of 1128089 is about 104.0992949599.

The spelling of 1128089 in words is "one million, one hundred twenty-eight thousand, eighty-nine".