Q: Is 921,438 a Prime Number?
A: No, 921,438 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 921438 can be evenly divided by 1 2 3 6 7 9 14 18 21 42 63 71 103 126 142 206 213 309 426 497 618 639 721 927 994 1,278 1,442 1,491 1,854 2,163 2,982 4,326 4,473 6,489 7,313 8,946 12,978 14,626 21,939 43,878 51,191 65,817 102,382 131,634 153,573 307,146 460,719 and 921,438, with no remainder.
Since 921,438 cannot be divided by just 1 and 921,438, it is not a prime number.