Q: Is 642,248 a Prime Number?
A: No, 642,248 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 642248 can be evenly divided by 1 2 4 8 43 86 172 344 1,867 3,734 7,468 14,936 80,281 160,562 321,124 and 642,248, with no remainder.
Since 642,248 cannot be divided by just 1 and 642,248, it is not a prime number.