Q: Is 1,637,620 a Prime Number?
A: No, 1,637,620 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 1637620 can be evenly divided by 1 2 4 5 10 20 37 74 148 185 370 740 2,213 4,426 8,852 11,065 22,130 44,260 81,881 163,762 327,524 409,405 818,810 and 1,637,620, with no remainder.
Since 1,637,620 cannot be divided by just 1 and 1,637,620, it is not a prime number.