80001

80001 is the natural number that follows 80000 and precedes 80002. It is an odd integer and is sometimes encountered in discussions of five-digit numbers and simple arithmetic.

In arithmetic, the prime factorization of 80001 is 3^3 × 2963, so it is not prime. Since the sum of digits is 9, 80001 is divisible by 9 and therefore by 27 as well, giving 80001 = 27 × 2963. This also makes it a Harshad (Niven) number in base 10, meaning it is divisible by the sum of its decimal digits.

Its representations in other bases include binary 10011100010000001, hexadecimal 0x13881, and octal 234201_8. These forms reflect its decimal value of 80,001.

There are no widely noted mathematical constants tied specifically to 80001. The number is sometimes used in examples due to its composite structure and simple divisibility properties.