The number 1 is sometimes very bad for me.

On it's own, as 1, it's fine, no problem.

The number 1 in the beginning of a number is fine.... such as 18, 124, 1450

The number 1 at the end of a number is fine...... such as 241, 3451

But the number 1 anywhere in the middle of a number bothers me very very much.

Unless it is accompanied by another 1; 11 is very good, very lucky for me.

Also, I have no problem with 1 being in the middle, if 0 is the final digit... 1310 and 510 for example are ok

For one thing, I always feel like the number 1 gets lost in big numbers, that someone might miss it if I don't write it clear enough, so then I have to rewrite the number over and over, waste envelopes and forms and such, until it looks unmistakable.

(Don't even get me started about putting a 1 next to a 7...)

But I hate that number combo so much, I don't like that I have to write it in the first place. I can walk into a building, call a number no problem with a 1 in the middle of it somewhere. One of my last addresses had that number combo. But still having to see it gave me the creeps kinda - like I could live at that house without fixating on the address, it didn't bother me unless I was up front and it caught my eye and I physically looked at it - that really made me feel uneasy. Also getting mail was ok because I didn't fixate on how the person wrote my address, I didn't have to since that piece of mail got to my home no problem.

So mostly my problem is a perfectionist sort of issue, I don't want someone to mistake my handwriting for example. But on the other hand, it does give me a bad feeling. Those number combos seem wrong to me, seem bad - but maybe that second reason is a byproduct of my perfectionist issues with it in the first place.