Q: Is 1,345,820 a Prime Number?
A: No, 1,345,820 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 1345820 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 9,613 19,226 38,452 48,065 67,291 96,130 134,582 192,260 269,164 336,455 672,910 and 1,345,820, with no remainder.
Since 1,345,820 cannot be divided by just 1 and 1,345,820, it is not a prime number.