Q: Is 1,372,820 a Prime Number?
A: No, 1,372,820 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 1372820 can be evenly divided by 1 2 4 5 10 20 83 166 332 415 827 830 1,654 1,660 3,308 4,135 8,270 16,540 68,641 137,282 274,564 343,205 686,410 and 1,372,820, with no remainder.
Since 1,372,820 cannot be divided by just 1 and 1,372,820, it is not a prime number.