The GCD of given numbers is 1.
| factors of 1234567 are : | 1 , 127 , 9721 , 1234567 |
| factors of 7654321 are : | 1 , 19 , 402859 , 7654321 |
We see that the Greatest Common Factor = 1.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.