Numbers / 124

The Number 124

124 is composite: factorization 2^2 × 31. That gives 124 exactly 6 divisors: 1, 2, 4, 31, 62, 124. 124's proper divisors total just 100, 24 short of 124, the deficient case most of 124's neighbors share too. 124 has a digit sum of 7; for 124, the digital root works out to 7. 124: 2, 4 all divide 124 evenly, out of 2-12. 124 is 1111100 in binary and 7C in hex; as a Roman numeral it's CXXIV.