Do I meet the minimum system requirements?

[Shuttle256]

I'm thinking of purchasing the game, but I'm not sure whether my laptop can handle it.
 

Specs:

Processor    Intel(R) Celeron(R) N4000 CPU @ 1.10GHz   1.10 GHz
Installed RAM    4.00 GB (3.81 GB usable)
System type    64-bit operating system, x64-based processor

[Gargamel]

It will probably run slow, but yes, I think your machine can handle the stock game.   Mods might be another question, as you will be limited by RAM.  But to be honest, your machine is on the very low end of what can run KSP.  Don't expect high frame rates or fast loading times (I used to have 20-30 minutes waits just to load the game), but it should be playable. 

[Kerbal Productions]

You can, but it'll run slow and be laggy. I have the same processor as yours last time (today I have an i3), and it took me 15-20 mins to load, and everything is so laggy. You can purchase that, but try not to expect smooth gameplay.