1005

1005 is a natural number that follows 1004 and precedes 1006. In mathematics, it is an odd composite number with prime factorization 3 × 5 × 67; its positive divisors are 1, 3, 5, 15, 67, 201, 335, and 1005. The sum of its proper divisors is 627, so it is a deficient number. In different numeral systems, 1005 is 1111101101 in binary and 0x3ED in hexadecimal. In Roman numerals the value is MV.

In calendar usage, 1005 refers to the year AD 1005, which falls in the middle of the 11th century. Events attributed to this year vary by region and historical source, and the year would have been part of the broader medieval world.

In culture and technology, the number appears in model names and identifiers, such as the HP LaserJet 1005 printer, among other uses. The digits sum to six, so 1005 is not a Harshad number, since it is not divisible by the sum of its digits.