Exhibit 23.1


Independent Registered Public Accounting Firm’s Consent


We consent to the incorporation by reference in this Registration Statement of Actinium Pharmaceuticals, Inc. on Form S-3 of our report dated May 8, 2020, with respect to our audits of the consolidated financial statements of Actinium Pharmaceuticals, Inc. as of December 31, 2019 and 2018 and for the years ended December 31, 2019 and 2018 appearing in the Annual Report on Form 10-K of Actinium Pharmaceuticals, Inc. for the year ended December 31, 2019. We also consent to the reference to our firm under the heading “Experts” in the Prospectus, which is part of this Registration Statement.


/s/ Marcum llp


Marcum llp

Houston, Texas

August 7, 2020