Q: Is 125,207,550 a Prime Number?

Why is 125,207,550 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 125207550 can be evenly divided by 1 2 3 5 6 9 10 13 15 17 18 25 26 30 34 39 45 50 51 65 75 78 85 90 102 117 130 150 153 170 195 221 225 234 255 306 325 390 425 442 450 510 585 650 663 765 850 975 1,105 1,170 1,259 1,275 1,326 1,530 1,950 1,989 2,210 2,518 2,550 2,925 3,315 3,777 3,825 3,978 5,525 5,850 6,295 6,630 7,554 7,650 9,945 11,050 11,331 12,590 16,367 16,575 18,885 19,890 21,403 22,662 31,475 32,734 33,150 37,770 42,806 49,101 49,725 56,655 62,950 64,209 81,835 94,425 98,202 99,450 107,015 113,310 128,418 147,303 163,670 188,850 192,627 214,030 245,505 278,239 283,275 294,606 321,045 385,254 409,175 491,010 535,075 556,478 566,550 642,090 736,515 818,350 834,717 963,135 1,070,150 1,227,525 1,391,195 1,473,030 1,605,225 1,669,434 1,926,270 2,455,050 2,504,151 2,782,390 3,210,450 3,682,575 4,173,585 4,815,675 5,008,302 6,955,975 7,365,150 8,347,170 9,631,350 12,520,755 13,911,950 20,867,925 25,041,510 41,735,850 62,603,775 and 125,207,550, with no remainder.

Since 125,207,550 cannot be divided by just 1 and 125,207,550, it is not a prime number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).