Actinium Pharmaceuticals (ATNM) 10-K 2015 FY Annual report

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER, PURSUANT TO

18 U.S.C. SECTION 1350,AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Actinium Pharmaceuticals, Inc. a Delaware corporation (the “Company”), on Form 10-K for the period ended December 31, 2015 as filed with the Securities and Exchange Commission (the “Report”), I, Kaushik J. Dave, Chief Executive Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350), that to my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Kaushik J. Dave                                     

Kaushik J. Dave

Chief Executive Officer

(Principal Executive Officer)

Date:  March 11, 2016