EPORN/Examples

Theorem
The number $2520$ is the smallest which can be expressed as the product of a number and its reversal in two different ways:

The number $63 \, 504$ is the smallest which is not a multiple of $10$:

The number $7 \, 683 \, 984$ is another such which includes a palindrome and is therefore square:

The number $144 \, 648$ does not include a palindrome: