No it's soldered. You can't change it. The price of the mobo which has all the stuff soldered on is almost as much as an entire new one. You could sell yours, use that same money you'd spend on the upgrade and get a new laptop that is double the performance.
It's possible if that cpu is socketed not soldered, but given that a quick google search for stores selling one turn up nothing, I would say not worth the hassle.
Laptops are generally only upgradable on ram and storage, sometimes wireless card.
If the CPU is socketed, you still need to find a CPU that is compatible with the chipset on the laptop's motherboard. Depending on the age of the laptop, this may or may not be an easy task.
No it's soldered. You can't change it. The price of the mobo which has all the stuff soldered on is almost as much as an entire new one. You could sell yours, use that same money you'd spend on the upgrade and get a new laptop that is double the performance.