Q: Is 1,207,638 a Prime Number?
A: No, 1,207,638 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 1207638 can be evenly divided by 1 2 3 6 9 18 23 46 69 138 207 414 2,917 5,834 8,751 17,502 26,253 52,506 67,091 134,182 201,273 402,546 603,819 and 1,207,638, with no remainder.
Since 1,207,638 cannot be divided by just 1 and 1,207,638, it is not a prime number.