sentence: selected 7-digit numbers ( 1,000,000 -- 9,999,999 ) 1,000,003 -- smallest 7 - digit prime number 1,046,527 -- carol number 1,048,576 = 2 20 ( power of two ) , 2,116 - gonal number , an 8,740-gonal number and a 174,764-gonal number , the number of byte in a mebibyte , the number of kibibyte in a gibibyte , and so on .