What is the syntactic position of «أَحَدَ عَشَرَ» in «جَاءَ أَحَدَ عَشَرَ طَالِبًا»?

Al-Murakkabāt — Compound Numerals, the Twelve Exception and Declining Baalbek

• Object in the accusative position
• Subject in the nominative position
• Genitive second term of iḍāfah
• Predicate of kāna