1109000 has 32 divisors (see below), whose sum is σ = 2597400. Its totient is φ = 443200.

The previous prime is 1108999. The next prime is 1109021. The reversal of 1109000 is 9011.

It can be written as a sum of positive squares in 4 ways, for example, as 64516 + 1044484 = 254^2 + 1022^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446 + ... + 1554.

2^1109000 is an apocalyptic number.

1109000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298700).

1109000 is an abundant number, since it is smaller than the sum of its proper divisors (1488400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1109000 is a wasteful number, since it uses less digits than its factorization.

1109000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1109000 is about 1053.0906893521. The cubic root of 1109000 is about 103.5087781457.

Adding to 1109000 its sum of digits (11), we get a palindrome (1109011).

The spelling of 1109000 in words is "one million, one hundred nine thousand".