Q: Is 1,620,423 a Composite Number?
A: Yes, 1,620,423 is a composite number.
The number 1,620,423 can be evenly divided by 1 3 7 9 17 21 51 63 89 119 153 267 289 357 623 801 867 1,071 1,513 1,869 2,023 2,601 4,539 5,607 6,069 10,591 13,617 18,207 25,721 31,773 77,163 95,319 180,047 231,489 540,141 and 1,620,423, with no remainder.
Since 1,620,423 cannot be divided by just 1 and 1,620,423, it is a composite number.