numeric
four thousand; 4,000
The number 4000. Reading よんせん is standard; しせん is a less common alternative reading.
この町の人口は約四千人です。
The population of this town is about four thousand.
四千円でこの本を買いました。
I bought this book for 4,000 yen.
Mixed kanji-numeral spelling, seen in some contexts but less common.
Arabic numeral spelling, very common in horizontal writing and statistics.
Kanji with zero characters, rarely used; mostly for stylistic or formal numbering.
Compound of 四 (four) and 千 (thousand).