Q: Is 402,143 a Prime Number?
A: No, 402,143 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 402143 can be evenly divided by 1 7 29 49 203 283 1,421 1,981 8,207 13,867 57,449 and 402,143, with no remainder.
Since 402,143 cannot be divided by just 1 and 402,143, it is not a prime number.