Who am I?    n°4

I am a number with 5 digits.
My 'units' digit is half of my 'hundreds' digit.
My 'thousands' digit is 8.
My 'hundreds' digit is the same as my 'thousands' digit.
My first digit is 1.
My 'tens' digit is the difference between my two neighbours.

Who am I?

I am the number


If you get stuck, use pen and paper to help you figure it out!