Q: Is 4,721,820 a Prime Number?
A: No, 4,721,820 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 4721820 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 78,697 157,394 236,091 314,788 393,485 472,182 786,970 944,364 1,180,455 1,573,940 2,360,910 and 4,721,820, with no remainder.
Since 4,721,820 cannot be divided by just 1 and 4,721,820, it is not a prime number.