Q: Is 2,142,765 a Prime Number?
A: No, 2,142,765 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 2142765 can be evenly divided by 1 3 5 9 15 17 45 51 85 153 255 765 2,801 8,403 14,005 25,209 42,015 47,617 126,045 142,851 238,085 428,553 714,255 and 2,142,765, with no remainder.
Since 2,142,765 cannot be divided by just 1 and 2,142,765, it is not a prime number.