Declension table of ?sahasraputra

Neuter	Singular	Dual	Plural
Nominative	sahasraputram	sahasraputre	sahasraputrāṇi
Vocative	sahasraputra	sahasraputre	sahasraputrāṇi
Accusative	sahasraputram	sahasraputre	sahasraputrāṇi
Instrumental	sahasraputreṇa	sahasraputrābhyām	sahasraputraiḥ
Dative	sahasraputrāya	sahasraputrābhyām	sahasraputrebhyaḥ
Ablative	sahasraputrāt	sahasraputrābhyām	sahasraputrebhyaḥ
Genitive	sahasraputrasya	sahasraputrayoḥ	sahasraputrāṇām
Locative	sahasraputre	sahasraputrayoḥ	sahasraputreṣu

Compound sahasraputra -

Adverb -sahasraputram -sahasraputrāt