Q: Is 1,645,000 a Composite Number?

Why is 1,645,000 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 1,645,000 can be evenly divided by 1 2 4 5 7 8 10 14 20 25 28 35 40 47 50 56 70 94 100 125 140 175 188 200 235 250 280 329 350 376 470 500 625 658 700 875 940 1,000 1,175 1,250 1,316 1,400 1,645 1,750 1,880 2,350 2,500 2,632 3,290 3,500 4,375 4,700 5,000 5,875 6,580 7,000 8,225 8,750 9,400 11,750 13,160 16,450 17,500 23,500 29,375 32,900 35,000 41,125 47,000 58,750 65,800 82,250 117,500 164,500 205,625 235,000 329,000 411,250 822,500 and 1,645,000, with no remainder.

Since 1,645,000 cannot be divided by just 1 and 1,645,000, it is a composite number.

More Examples

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