Q: Is 857,420 a Prime Number?
A: No, 857,420 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 857420 can be evenly divided by 1 2 4 5 10 20 43 86 172 215 430 860 997 1,994 3,988 4,985 9,970 19,940 42,871 85,742 171,484 214,355 428,710 and 857,420, with no remainder.
Since 857,420 cannot be divided by just 1 and 857,420, it is not a prime number.