Q: Is 172,840 a Prime Number?
A: No, 172,840 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 172840 can be evenly divided by 1 2 4 5 8 10 20 29 40 58 116 145 149 232 290 298 580 596 745 1,160 1,192 1,490 2,980 4,321 5,960 8,642 17,284 21,605 34,568 43,210 86,420 and 172,840, with no remainder.
Since 172,840 cannot be divided by just 1 and 172,840, it is not a prime number.