Q: Is 6,438,420 a Prime Number?
A: No, 6,438,420 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 6438420 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 90 108 135 180 270 540 11,923 23,846 35,769 47,692 59,615 71,538 107,307 119,230 143,076 178,845 214,614 238,460 321,921 357,690 429,228 536,535 643,842 715,380 1,073,070 1,287,684 1,609,605 2,146,140 3,219,210 and 6,438,420, with no remainder.
Since 6,438,420 cannot be divided by just 1 and 6,438,420, it is not a prime number.