Q: Is 142,443 a Prime Number?
A: No, 142,443 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 142443 can be evenly divided by 1 3 7 9 17 19 21 49 51 57 63 119 133 147 153 171 323 357 399 441 833 931 969 1,071 1,197 2,261 2,499 2,793 2,907 6,783 7,497 8,379 15,827 20,349 47,481 and 142,443, with no remainder.
Since 142,443 cannot be divided by just 1 and 142,443, it is not a prime number.