Q: Is 642,624 a Prime Number?
A: No, 642,624 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 642624 can be evenly divided by 1 2 3 4 6 8 12 16 24 32 48 64 96 192 3,347 6,694 10,041 13,388 20,082 26,776 40,164 53,552 80,328 107,104 160,656 214,208 321,312 and 642,624, with no remainder.
Since 642,624 cannot be divided by just 1 and 642,624, it is not a prime number.