Q: Is 280,140 a Prime Number?
A: No, 280,140 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 280140 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 23 28 29 30 35 42 46 58 60 69 70 84 87 92 105 115 116 138 140 145 161 174 203 210 230 276 290 322 345 348 406 420 435 460 483 580 609 644 667 690 805 812 870 966 1,015 1,218 1,334 1,380 1,610 1,740 1,932 2,001 2,030 2,415 2,436 2,668 3,045 3,220 3,335 4,002 4,060 4,669 4,830 6,090 6,670 8,004 9,338 9,660 10,005 12,180 13,340 14,007 18,676 20,010 23,345 28,014 40,020 46,690 56,028 70,035 93,380 140,070 and 280,140, with no remainder.
Since 280,140 cannot be divided by just 1 and 280,140, it is not a prime number.