Scanners feed pages upside down, double-sided scans come out of order, and exported reports pick up stray blank pages. All of these are quick fixes.
Rotate
Rotate PDF turns every page, or only the pages you choose, by 90, 180 or 270 degrees. Rotation is lossless: the page content is not re-encoded, so quality is unchanged.
Reorder
Reorder Pages lets you set a new page order. If you scanned the front sides and back sides of a stack as two separate files, Alternate & Mix weaves them back into one document, and can reverse the back sides if they were scanned last page first.
Delete
Remove Pages deletes the pages you list. Remove Blank Pages finds empty pages automatically, which is handy after scanning a mix of single- and double-sided paper.