8121

8121 is a positive integer that follows 8120 and precedes 8122. In mathematics, it is composite, with prime factorization 3 × 2707, where 2707 is prime, making 8121 a semiprime.

The sum of its decimal digits is 12, so the number is divisible by 3 but not by 9. It is odd and not divisible by 5. Its approximate square root is 90.1, placing it between 90^2 = 8100 and 91^2 = 8281.

In base representations, 8121 is written as 0x1FB9 in hexadecimal, and as the binary string 1111110111001. In decimal, of course, it remains 8121. The number is congruent to 1 modulo 4.

As a mathematical object, 8121 is a semiprime and a member of the set of integers with exactly two prime factors counting multiplicity.

There is no widely used name attached to 8121 beyond its role as a numerical value; it may appear in numerical lists, catalogs, or databases as an identifier like any other integer.