Q: Is 2,155,425 a Prime Number?
A: No, 2,155,425 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 2155425 can be evenly divided by 1 3 5 15 25 29 75 87 145 435 725 991 2,175 2,973 4,955 14,865 24,775 28,739 74,325 86,217 143,695 431,085 718,475 and 2,155,425, with no remainder.
Since 2,155,425 cannot be divided by just 1 and 2,155,425, it is not a prime number.