I have lots of file like these:

13831_1.jpg
13838_1.jpg
138035_1.jpg
138037_1.jpg
138039_1.jpg

I need to add a value of 5000000 to the numbers of the filenames. The result should be the following:

5013831_1.jpg
5013838_1.jpg
5138035_1.jpg
5138037_1.jpg
5138039_1.jpg

Is there a way to do it with bash or perl?

bash rename file-rename
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