Q: Is 1,543,404 a Prime Number?
A: No, 1,543,404 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 1543404 can be evenly divided by 1 2 3 4 6 12 41 82 123 164 246 492 3,137 6,274 9,411 12,548 18,822 37,644 128,617 257,234 385,851 514,468 771,702 and 1,543,404, with no remainder.
Since 1,543,404 cannot be divided by just 1 and 1,543,404, it is not a prime number.