Numbers / 575

The Number 575

575 is composite: factorization 5^2 × 23. That gives 575 exactly 6 divisors: 1, 5, 23, 25, 115, 575. 575's proper divisors total just 169, 406 short of 575, the deficient case most of 575's neighbors share too. 575 is also a palindrome, since 575 reads identically forwards and backwards. 575 has a digit sum of 17; for 575, the digital root works out to 8. 575: 5 all divide 575 evenly, out of 2-12. 575 is 1000111111 in binary and 23F in hex; as a Roman numeral it's DLXXV.