1128109 has 2 divisors, whose sum is σ = 1128110. Its totient is φ = 1128108.

The previous prime is 1128107. The next prime is 1128143. The reversal of 1128109 is 9018211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 272484 = 925^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128109 - 2¹ = 1128107 is a prime.

Together with 1128107, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1128109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564054 + 564055.

It is an arithmetic number, because the mean of its divisors is an integer number (564055).

2^1128109 is an apocalyptic number.

It is an amenable number.

1128109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128109 is an equidigital number, since it uses as much as digits as its factorization.

1128109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1128109 is about 1062.1247572672. The cubic root of 1128109 is about 104.0999101518.

The spelling of 1128109 in words is "one million, one hundred twenty-eight thousand, one hundred nine".