Ezra 2:7 Kabbalah

בְּנֵ֣י עֵילָ֔ם אֶ֕לֶף מָאתַ֖יִם חֲמִשִּׁ֥ים וְאַרְבָּעָֽה׃ (ס)

The children of Elam, a thousand two hundred fifty and four.

Read kabbalistic (mystical) interpretation of Ezra 2:7: and classical mystical sources.