6465

6465 is a natural number that follows 6464 and precedes 6466. In mathematics, it is an odd composite number. Its prime factorization is 3 × 5 × 431, with 431 prime. Therefore, it has eight divisors: 1, 3, 5, 15, 431, 1293, 2155, and 6465. The number is divisible by 3 and by 5, hence by 15; the digit sum is 21, so it is divisible by 3 but not by 9.

In decimal notation, it is written as 6465. In hexadecimal notation, it is 0x1941, and in binary it is 0001100101000001. The decimal representation highlights the factorization as 15 × 431.

As a calendar year, 6465 CE would fall in the distant future, with no widely documented events tied to it. The product of its digits is 6 × 4 × 6 × 5 = 720, which equals 6!, a coincidental observation that sometimes attracts note in trivia contexts. The number is not prime, not a power, and does not belong to many common small-number sequences beyond its basic factorization.