Q: Is 721,020 a Prime Number?

 A: No, 721,020 is not a prime number.

Why is 721,020 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 721020 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 61 122 183 197 244 305 366 394 591 610 732 788 915 985 1,182 1,220 1,830 1,970 2,364 2,955 3,660 3,940 5,910 11,820 12,017 24,034 36,051 48,068 60,085 72,102 120,170 144,204 180,255 240,340 360,510 and 721,020, with no remainder.

Since 721,020 cannot be divided by just 1 and 721,020, it is not a prime number.


More Examples

Number 721,018721,019721,021721,022
Prime? nononono
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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