I assume you are talking about a simple latex article. In other cases, something more complex may be necessary. 
```
\documentclass{article}

\usepackage{fancyhdr}
\usepackage{tikzlings}

\setlength{\footskip}{45pt}
\pagestyle{fancy}
\cfoot{%
    \begin{tikzpicture}[scale=0.5]
        \tikzling 
        \node at (2.5cm,0.7cm) {\thepage};
    \end{tikzpicture}
} 

\begin{document}
content...
\end{document}  
```
Thanks @Samcarter
to get

![image.png](/image?hash=8060b88d09c613b7d1d9cbbea5a3f6127921a2788b12f010f8a786e0ec8f1c23)

Of course this is just a `TikZpicture` hack. I have not tested this under various conditions.

[Overleaf example random_tikzlings_as_page_nos](https://www.overleaf.com/read/dmmzhsnjjdnf)