Q: Is 258,440 a Prime Number?
A: No, 258,440 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 258440 can be evenly divided by 1 2 4 5 7 8 10 13 14 20 26 28 35 40 52 56 65 70 71 91 104 130 140 142 182 260 280 284 355 364 455 497 520 568 710 728 910 923 994 1,420 1,820 1,846 1,988 2,485 2,840 3,640 3,692 3,976 4,615 4,970 6,461 7,384 9,230 9,940 12,922 18,460 19,880 25,844 32,305 36,920 51,688 64,610 129,220 and 258,440, with no remainder.
Since 258,440 cannot be divided by just 1 and 258,440, it is not a prime number.