Q: Is 243,820 a Prime Number?
A: No, 243,820 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 243820 can be evenly divided by 1 2 4 5 10 20 73 146 167 292 334 365 668 730 835 1,460 1,670 3,340 12,191 24,382 48,764 60,955 121,910 and 243,820, with no remainder.
Since 243,820 cannot be divided by just 1 and 243,820, it is not a prime number.