105 (number)

One hundred five (105, CV) is the natural number following one hundred four and preceding one hundred six. It is a composite number, with its divisors being 3, 5, 7, 15, 21 and 35, and its factorization

$105=3\cdot 5\cdot 7$

makes it a sphenic number.

One hundred five is also:

• The atomic number of hahnium, also known as dubnium.
• The designation of some spur routes of Interstate 5.

This article is about the number. For the year AD 105, see 105.