Q: Is 258,400 a Prime Number?
A: No, 258,400 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 258400 can be evenly divided by 1 2 4 5 8 10 16 17 19 20 25 32 34 38 40 50 68 76 80 85 95 100 136 152 160 170 190 200 272 304 323 340 380 400 425 475 544 608 646 680 760 800 850 950 1,292 1,360 1,520 1,615 1,700 1,900 2,584 2,720 3,040 3,230 3,400 3,800 5,168 6,460 6,800 7,600 8,075 10,336 12,920 13,600 15,200 16,150 25,840 32,300 51,680 64,600 129,200 and 258,400, with no remainder.
Since 258,400 cannot be divided by just 1 and 258,400, it is not a prime number.