The name can be anything. It’s possible if the image came from a digital camera or other source it uses a sequential number with a prefix. My photos create a file DSC001324.jpg then the next is DSC001325.jpg. The properties will provide more info. If you open the folder with windows explorer and select the image it will give tons of info in the bottom panel dimensions , date taken and some will even provide camera detail like speed, lens and some eve capture GPS location of the shoot.