Q: Is 641,424 a Prime Number?
A: No, 641,424 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 641424 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 23 24 28 42 46 48 56 69 83 84 92 112 138 161 166 168 184 249 276 322 332 336 368 483 498 552 581 644 664 966 996 1,104 1,162 1,288 1,328 1,743 1,909 1,932 1,992 2,324 2,576 3,486 3,818 3,864 3,984 4,648 5,727 6,972 7,636 7,728 9,296 11,454 13,363 13,944 15,272 22,908 26,726 27,888 30,544 40,089 45,816 53,452 80,178 91,632 106,904 160,356 213,808 320,712 and 641,424, with no remainder.
Since 641,424 cannot be divided by just 1 and 641,424, it is not a prime number.