Q: Is 421,040 a Prime Number?
A: No, 421,040 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 421040 can be evenly divided by 1 2 4 5 8 10 16 19 20 38 40 76 80 95 152 190 277 304 380 554 760 1,108 1,385 1,520 2,216 2,770 4,432 5,263 5,540 10,526 11,080 21,052 22,160 26,315 42,104 52,630 84,208 105,260 210,520 and 421,040, with no remainder.
Since 421,040 cannot be divided by just 1 and 421,040, it is not a prime number.