Q: Is 1,142,145 a Prime Number?
A: No, 1,142,145 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 1142145 can be evenly divided by 1 3 5 9 15 17 45 51 85 153 255 765 1,493 4,479 7,465 13,437 22,395 25,381 67,185 76,143 126,905 228,429 380,715 and 1,142,145, with no remainder.
Since 1,142,145 cannot be divided by just 1 and 1,142,145, it is not a prime number.