CAN ITHE IPAD MINI MODEL NUMBER A1432 BE UPDATED

None of the numbers you give match a model

https://support.apple.com/en-us/HT201471

You can try to go to the web address in the linked page and see if it lists the details of your device

Check your Apple ID device list to see where you're signed in - Apple Support

ETA: Ah see, I was looking at the body of the post not the title, my bad.

The original iPad mini can be updated to iOS 9.3.5.