Q: Is 257,742 a Prime Number?
A: No, 257,742 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 257742 can be evenly divided by 1 2 3 6 9 18 27 37 43 54 74 81 86 111 129 162 222 258 333 387 666 774 999 1,161 1,591 1,998 2,322 2,997 3,182 3,483 4,773 5,994 6,966 9,546 14,319 28,638 42,957 85,914 128,871 and 257,742, with no remainder.
Since 257,742 cannot be divided by just 1 and 257,742, it is not a prime number.