Q: Is 3,221,440 a Prime Number?
A: No, 3,221,440 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 3221440 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 10,067 20,134 40,268 50,335 80,536 100,670 161,072 201,340 322,144 402,680 644,288 805,360 1,610,720 and 3,221,440, with no remainder.
Since 3,221,440 cannot be divided by just 1 and 3,221,440, it is not a prime number.