Q: Is 72,421,440 a Prime Number?

 A: No, 72,421,440 is not a prime number.

Why is 72,421,440 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 72421440 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 32 35 39 40 42 48 52 56 60 64 65 70 78 80 84 91 96 104 105 112 120 130 140 156 160 168 182 192 195 208 210 224 240 260 273 280 312 320 336 364 390 416 420 448 455 480 520 546 560 624 672 728 780 829 832 840 910 960 1,040 1,092 1,120 1,248 1,344 1,365 1,456 1,560 1,658 1,680 1,820 2,080 2,184 2,240 2,487 2,496 2,730 2,912 3,120 3,316 3,360 3,640 4,145 4,160 4,368 4,974 5,460 5,803 5,824 6,240 6,632 6,720 7,280 8,290 8,736 9,948 10,777 10,920 11,606 12,435 12,480 13,264 14,560 16,580 17,409 17,472 19,896 21,554 21,840 23,212 24,870 26,528 29,015 29,120 32,331 33,160 34,818 39,792 43,108 43,680 46,424 49,740 53,056 53,885 58,030 64,662 66,320 69,636 75,439 79,584 86,216 87,045 87,360 92,848 99,480 107,770 116,060 129,324 132,640 139,272 150,878 159,168 161,655 172,432 174,090 185,696 198,960 215,540 226,317 232,120 258,648 265,280 278,544 301,756 323,310 344,864 348,180 371,392 377,195 397,920 431,080 452,634 464,240 517,296 557,088 603,512 646,620 689,728 696,360 754,390 795,840 862,160 905,268 928,480 1,034,592 1,114,176 1,131,585 1,207,024 1,293,240 1,392,720 1,508,780 1,724,320 1,810,536 1,856,960 2,069,184 2,263,170 2,414,048 2,586,480 2,785,440 3,017,560 3,448,640 3,621,072 4,526,340 4,828,096 5,172,960 5,570,880 6,035,120 7,242,144 9,052,680 10,345,920 12,070,240 14,484,288 18,105,360 24,140,480 36,210,720 and 72,421,440, with no remainder.

Since 72,421,440 cannot be divided by just 1 and 72,421,440, 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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