Q: Is 1,648,215 a Prime Number?
A: No, 1,648,215 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 1648215 can be evenly divided by 1 3 5 9 15 27 29 45 87 135 145 261 421 435 783 1,263 1,305 2,105 3,789 3,915 6,315 11,367 12,209 18,945 36,627 56,835 61,045 109,881 183,135 329,643 549,405 and 1,648,215, with no remainder.
Since 1,648,215 cannot be divided by just 1 and 1,648,215, it is not a prime number.