Q: Is 1,642,840 a Prime Number?
A: No, 1,642,840 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 1642840 can be evenly divided by 1 2 4 5 8 10 20 40 67 134 268 335 536 613 670 1,226 1,340 2,452 2,680 3,065 4,904 6,130 12,260 24,520 41,071 82,142 164,284 205,355 328,568 410,710 821,420 and 1,642,840, with no remainder.
Since 1,642,840 cannot be divided by just 1 and 1,642,840, it is not a prime number.