Q: Is 121,401,420 a Prime Number?

 A: No, 121,401,420 is not a prime number.

Why is 121,401,420 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 121401420 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 17 20 21 28 30 34 35 42 49 51 60 68 70 84 85 98 102 105 119 140 147 170 196 204 210 238 245 255 294 340 343 347 357 420 476 490 510 588 595 686 694 714 735 833 980 1,020 1,029 1,041 1,190 1,372 1,388 1,428 1,470 1,666 1,715 1,735 1,785 2,058 2,082 2,380 2,429 2,499 2,940 3,332 3,430 3,470 3,570 4,116 4,164 4,165 4,858 4,998 5,145 5,205 5,831 5,899 6,860 6,940 7,140 7,287 8,330 9,716 9,996 10,290 10,410 11,662 11,798 12,145 12,495 14,574 16,660 17,003 17,493 17,697 20,580 20,820 23,324 23,596 24,290 24,990 29,148 29,155 29,495 34,006 34,986 35,394 36,435 41,293 48,580 49,980 51,009 58,310 58,990 68,012 69,972 70,788 72,870 82,586 85,015 87,465 88,485 102,018 116,620 117,980 119,021 123,879 145,740 165,172 170,030 174,930 176,970 204,036 206,465 238,042 247,758 255,045 289,051 340,060 349,860 353,940 357,063 412,930 476,084 495,516 510,090 578,102 595,105 619,395 714,126 825,860 867,153 1,020,180 1,156,204 1,190,210 1,238,790 1,428,252 1,445,255 1,734,306 1,785,315 2,023,357 2,380,420 2,477,580 2,890,510 3,468,612 3,570,630 4,046,714 4,335,765 5,781,020 6,070,071 7,141,260 8,093,428 8,671,530 10,116,785 12,140,142 17,343,060 20,233,570 24,280,284 30,350,355 40,467,140 60,700,710 and 121,401,420, with no remainder.

Since 121,401,420 cannot be divided by just 1 and 121,401,420, it is not a prime number.


More Examples

  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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