1128909 has 8 divisors (see below), whose sum is σ = 1570752. Its totient is φ = 719840.

The previous prime is 1128901. The next prime is 1128917. The reversal of 1128909 is 9098211.

It is an interprime number because it is at equal distance from previous prime (1128901) and next prime (1128917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1128909 - 2³ = 1128901 is a prime.

It is a Curzon 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 (1128901) 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 in 7 ways as a sum of consecutive naturals, for example, 8112 + ... + 8249.

It is an arithmetic number, because the mean of its divisors is an integer number (196344).

2^1128909 is an apocalyptic number.

It is an amenable number.

1128909 is a deficient number, since it is larger than the sum of its proper divisors (441843).

1128909 is a wasteful number, since it uses less digits than its factorization.

1128909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16387.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1128909 is about 1062.5012941169. The cubic root of 1128909 is about 104.1245118673.

It can be divided in two parts, 11 and 28909, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 1128909 in words is "one million, one hundred twenty-eight thousand, nine hundred nine".