The number 145

Representation numerals

Greek numeral

ρμεʹ

Arabic numeral

١٤٥

Roman numeral

CXLV

Maya numeral

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Chinese numeral

一百四十五

Hebrew numeral

קמה
Numeral systems
Binary: 10010001
Septimal (base 7): 265
Octal: 221
Hexadecimal: 91
Base 24: 61
Factorization
145 = 5 × 29
145 has 4 divisors: 1, 5, 29, 145
Sum of all divisors other than 145: 35
Sums & differences
Sum of 2 squares: 145 = 92 + 82
Difference of 2 squares: 145 = 172 - 122 = 732 - 722
Characteristics
145 is a pentagonal number
145 is a Layland number, 145 = 43 + 34
Related primes
The 145th prime number is: 829
Previous prime number: 139 — Next prime number: 149
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