Q: Is 1,391,427 a Prime Number?
A: No, 1,391,427 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 1391427 can be evenly divided by 1 3 9 19 57 79 103 171 237 309 711 927 1,501 1,957 4,503 5,871 8,137 13,509 17,613 24,411 73,233 154,603 463,809 and 1,391,427, with no remainder.
Since 1,391,427 cannot be divided by just 1 and 1,391,427, it is not a prime number.