4100

4100 is a natural number that lies between 4099 and 4101. It is an even, composite integer. Its prime factorization is 4100 = 2^2 × 5^2 × 41, which means it has 18 positive divisors. The number is divisible by 2, 4, 5, 10, 20, 25, 41, and other multiples derived from its factorization.

In other bases, 4100 can be represented as follows: binary 1000000000100, octal 10004, and hexadecimal 0x1004. In Roman numerals, large numbers are sometimes written with an overline to denote thousands; 4000 is commonly shown as overlined IV, so 4100 could be depicted as overlined IV followed by C (i.e., 4000 plus 100) in that convention.

Mathematically, 4100 is an abundant number, since the sum of its positive divisors is 9114, and 9114 − 4100 = 5014, which exceeds 4100. It is also a Harshad (or Niven) number in base 10 because it is divisible by the sum of its digits (4 + 1 + 0 + 0 = 5; 4100 ÷ 5 = 820).

As a calendar year, 4100 CE is in the 41st century and is far in the future relative to the present day, with no widely documented historical events associated with it. The number 4100 may also appear in technical specifications, model numbers, or cataloging contexts that are not tied to calendrical meaning.