1128911 has 6 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 967596.

The previous prime is 1128901. The next prime is 1128917. The reversal of 1128911 is 1198211.

It is a de Polignac number, because none of the positive numbers 2^k-1128911 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11471 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (218880).

2^1128911 is an apocalyptic number.

1128911 is a deficient number, since it is larger than the sum of its proper divisors (184369).

1128911 is an equidigital number, since it uses as much as digits as its factorization.

1128911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23053 (or 23046 counting only the distinct ones).

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

The square root of 1128911 is about 1062.5022352918. The cubic root of 1128911 is about 104.1245733570.

The spelling of 1128911 in words is "one million, one hundred twenty-eight thousand, nine hundred eleven".