What does the number in imagej bar mean?

What does the numbers in parenthesis crossed with red mean?
These numbers are shown when I placed the cursor in the upper left corner of yellow rectangle.

Hi @Zeynab_Mousavi,

Those are the coordinates of the cursor in pixel units, as opposed to the coordinates in calibrated units (micrometers, in your case). It follows the same logic as the size of the image that is provided in the header: calibrated_width x calibrated_height [physical units] ( width x height [in pixels]).