hmm printing is not one of SumatraPDF's strongest points but sending a single page # to elsewhere is. Thus, you can press a key and the page number plus file name be externalised which can include a command line print! (For whatever that is worth)!

Start by deciding what print output you need as windows will certainly interfere with starting choices.
https://www.sumatrapdfreader.org/docs/Command-line-arguments#printing-options

To set a single key rather than pull down requires latest pre-release (portable will do for testing)
Add into settings by replace something like this

ExternalViewers [
  [
    CommandLine = c:\path to \sumatrapdf.exe printer commands -print-settings """%p""" "%1"
    Name = Print Page
    Filter = *.*
    Key = Ctrl + p
  ]
]

So, for example if I set the Ctrl+P command to echo what might be sent via CMD we see the page number A is 1 and the filename is exported but rather than cmd.exe use SumatraPDF.exe with print commands as the target. Beware you may need to add extra quoting as shown above since that 1 should be "1"