Q: Is 1,257,138 a Prime Number?
A: No, 1,257,138 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 1257138 can be evenly divided by 1 2 3 6 9 18 211 331 422 633 662 993 1,266 1,899 1,986 2,979 3,798 5,958 69,841 139,682 209,523 419,046 628,569 and 1,257,138, with no remainder.
Since 1,257,138 cannot be divided by just 1 and 1,257,138, it is not a prime number.