Q: Is 42,140 a Prime Number?
A: No, 42,140 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 42140 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 43 49 70 86 98 140 172 196 215 245 301 430 490 602 860 980 1,204 1,505 2,107 3,010 4,214 6,020 8,428 10,535 21,070 and 42,140, with no remainder.
Since 42,140 cannot be divided by just 1 and 42,140, it is not a prime number.