4555

4555 is a natural number that follows 4554 and precedes 4556. In mathematics, it has several simple properties common to four-digit integers.

4555 factors as 5 × 911, with 911 being prime, so the number is composite and, more specifically, a semiprime. The sum of its digits is 19, which is prime, and the digital root is 1 (since 1 + 9 = 10, and 1 + 0 = 1). The number is divisible by 5 due to its final digit, but not divisible by 3 or 9.

In different bases, 4555 is written as 1000111001011 in binary, 10713 in octal, and 0x11CB in hexadecimal. In Roman numerals, a common representation is MMMMDLV, using four M’s to denote 4000 followed by D (500), L (50), and V (5).

As a year, 4555 CE would fall in the 5th millennium of the Gregorian calendar. Among its numerical properties, 4555 is not a palindrome in decimal, but its binary form contains seven 1s, making it an odious number. It is also squarefree, being the product of two distinct primes.