1109143 has 4 divisors (see below), whose sum is σ = 1267600. Its totient is φ = 950688.

The previous prime is 1109123. The next prime is 1109159. The reversal of 1109143 is 3419011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3419011 = 277 ⋅12343.

It is a cyclic number.

It is not a de Polignac number, because 1109143 - 2¹⁷ = 978071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1109143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109113) 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 3 ways as a sum of consecutive naturals, for example, 79218 + ... + 79231.

It is an arithmetic number, because the mean of its divisors is an integer number (316900).

2^1109143 is an apocalyptic number.

1109143 is a deficient number, since it is larger than the sum of its proper divisors (158457).

1109143 is an equidigital number, since it uses as much as digits as its factorization.

1109143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158456.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1109143 is about 1053.1585825506. The cubic root of 1109143 is about 103.5132269341.

The spelling of 1109143 in words is "one million, one hundred nine thousand, one hundred forty-three".