Q: Is 143,865 a Prime Number?
A: No, 143,865 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 143865 can be evenly divided by 1 3 5 9 15 23 45 69 115 139 207 345 417 695 1,035 1,251 2,085 3,197 6,255 9,591 15,985 28,773 47,955 and 143,865, with no remainder.
Since 143,865 cannot be divided by just 1 and 143,865, it is not a prime number.