Declension table of ?ṣaṭsahasra

Neuter	Singular	Dual	Plural
Nominative	ṣaṭsahasram	ṣaṭsahasre	ṣaṭsahasrāṇi
Vocative	ṣaṭsahasra	ṣaṭsahasre	ṣaṭsahasrāṇi
Accusative	ṣaṭsahasram	ṣaṭsahasre	ṣaṭsahasrāṇi
Instrumental	ṣaṭsahasreṇa	ṣaṭsahasrābhyām	ṣaṭsahasraiḥ
Dative	ṣaṭsahasrāya	ṣaṭsahasrābhyām	ṣaṭsahasrebhyaḥ
Ablative	ṣaṭsahasrāt	ṣaṭsahasrābhyām	ṣaṭsahasrebhyaḥ
Genitive	ṣaṭsahasrasya	ṣaṭsahasrayoḥ	ṣaṭsahasrāṇām
Locative	ṣaṭsahasre	ṣaṭsahasrayoḥ	ṣaṭsahasreṣu

Compound ṣaṭsahasra -

Adverb -ṣaṭsahasram -ṣaṭsahasrāt