Q: Is 555,401 a Prime Number?
A: No, 555,401 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 555401 can be evenly divided by 1 7 11 77 7,213 50,491 79,343 and 555,401, with no remainder.
Since 555,401 cannot be divided by just 1 and 555,401, it is not a prime number.