Q: Is 421,515 a Prime Number?

 A: No, 421,515 is not a prime number.

Why is 421,515 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 421515 can be evenly divided by 1 3 5 9 15 17 19 29 45 51 57 85 87 95 145 153 171 255 261 285 323 435 493 551 765 855 969 1,305 1,479 1,615 1,653 2,465 2,755 2,907 4,437 4,845 4,959 7,395 8,265 9,367 14,535 22,185 24,795 28,101 46,835 84,303 140,505 and 421,515, with no remainder.

Since 421,515 cannot be divided by just 1 and 421,515, it is not a prime number.


More Examples

Number 421,513421,514421,516421,517
Prime? nononoyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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