Q: Is 621,240 a Prime Number?
A: No, 621,240 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 621240 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 31 40 60 62 93 120 124 155 167 186 248 310 334 372 465 501 620 668 744 835 930 1,002 1,240 1,336 1,670 1,860 2,004 2,505 3,340 3,720 4,008 5,010 5,177 6,680 10,020 10,354 15,531 20,040 20,708 25,885 31,062 41,416 51,770 62,124 77,655 103,540 124,248 155,310 207,080 310,620 and 621,240, with no remainder.
Since 621,240 cannot be divided by just 1 and 621,240, it is not a prime number.