Q: Is 409,820 a Prime Number?
A: No, 409,820 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 409820 can be evenly divided by 1 2 4 5 10 20 31 62 124 155 310 620 661 1,322 2,644 3,305 6,610 13,220 20,491 40,982 81,964 102,455 204,910 and 409,820, with no remainder.
Since 409,820 cannot be divided by just 1 and 409,820, it is not a prime number.