Q: Is 423,040 a Prime Number?
A: No, 423,040 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 423040 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 661 1,322 2,644 3,305 5,288 6,610 10,576 13,220 21,152 26,440 42,304 52,880 84,608 105,760 211,520 and 423,040, with no remainder.
Since 423,040 cannot be divided by just 1 and 423,040, it is not a prime number.