1×810

1×810 is a basic arithmetic expression that multiplies the integers 1 and 810. By the multiplicative identity property, multiplying any number by 1 leaves that number unchanged, so 1×810 equals 810. The expression is commonly cited as an example of the identity element in multiplication and serves as a reminder of fundamental arithmetic rules.

810 is a positive even integer with prime factorization 2 × 3^4 × 5 (since 3^4 = 81 and 81×10 = 810). This factorization shows its divisibility by 2, by 3 and 9, and by 5, as well as by many composite divisors such as 6, 9, 10, 15, and 18. The full set of divisors includes numbers obtained by combining these prime factors in various ways, with 810 itself as the largest divisor.

In decimal form, 810 is composed of the digits 8, 1, and 0. The sum of its digits is 9, indicating divisibility by 9 and 3. The final digit 0 makes 810 divisible by 10 as well. As a composite number, 810 has more than two positive divisors.

Conceptually, the product 1×810 illustrates that the multiplicative identity is 1, a cornerstone of algebraic structures such as rings and fields, where similar rules apply to elements under multiplication. See also multiplicative identity; 810 (number).