Q: Is 172,720 a Prime Number?
A: No, 172,720 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 172720 can be evenly divided by 1 2 4 5 8 10 16 17 20 34 40 68 80 85 127 136 170 254 272 340 508 635 680 1,016 1,270 1,360 2,032 2,159 2,540 4,318 5,080 8,636 10,160 10,795 17,272 21,590 34,544 43,180 86,360 and 172,720, with no remainder.
Since 172,720 cannot be divided by just 1 and 172,720, it is not a prime number.