Is this iPhone I bought stolen?

Apple doesn't take reports of stolen devices.

Apple doesn't maintain any black list.

You will need to contact your cellular carrier.

It is not a good idea to post personal information on the internet.

As Johnathan Burger has mentioned, you will need to contact a cellular provider with this IMEI number to see if it is blacklisted with them. Not sure if providers share this information with other providers so you may need to contact your friend's provider (if different) in this case.

Also, did your friend proper prepare this iPhone for sale? Have them review the following support article and act on it, otherwise, the phone may be activation locked and totally useless to you/your father.

Ref: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod Touch - Apple Support

Sounds like you should re-evaluate your choice in 'friends' if this is a serious question...