Q: Is 642,480 a Prime Number?
A: No, 642,480 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 642480 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 2,677 5,354 8,031 10,708 13,385 16,062 21,416 26,770 32,124 40,155 42,832 53,540 64,248 80,310 107,080 128,496 160,620 214,160 321,240 and 642,480, with no remainder.
Since 642,480 cannot be divided by just 1 and 642,480, it is not a prime number.