Q: Is 676,420 a Prime Number?
A: No, 676,420 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 676420 can be evenly divided by 1 2 4 5 10 20 31 62 124 155 310 620 1,091 2,182 4,364 5,455 10,910 21,820 33,821 67,642 135,284 169,105 338,210 and 676,420, with no remainder.
Since 676,420 cannot be divided by just 1 and 676,420, it is not a prime number.