Numbers / 725

The Number 725

725 is composite: factorization 5^2 × 29. That gives 725 exactly 6 divisors: 1, 5, 25, 29, 145, 725. 725's proper divisors total just 205, 520 short of 725, the deficient case most of 725's neighbors share too. 725 has a digit sum of 14; for 725, the digital root works out to 5. 725: 5 all divide 725 evenly, out of 2-12. 725 is 1011010101 in binary and 2D5 in hex; as a Roman numeral it's DCCXXV.