Q: Is 540,423 a Prime Number?
A: No, 540,423 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 540423 can be evenly divided by 1 3 9 13 31 39 93 117 149 279 403 447 1,209 1,341 1,937 3,627 4,619 5,811 13,857 17,433 41,571 60,047 180,141 and 540,423, with no remainder.
Since 540,423 cannot be divided by just 1 and 540,423, it is not a prime number.