135
135 is a composite number, odd, a calendar year.
135 (one hundred thirty-five) is an odd 3-digit number. It is a composite number with 8 divisors, and factors as 3³ × 5. Written other ways, in Roman numerals it is CXXXV and in binary, 10000111.
Interestingness
Historical context — 135 AD
Calendar year
Year 135 (CXXXV) was a common year starting on Friday of the Julian calendar.
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Historical context — 135 BC
Calendar year
Year 135 BC was a year of the pre-Julian Roman calendar.
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Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Saturday
January 1, 135
- Ended on
-
Saturday
December 31, 135
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
130s
130–139
- Century
-
2nd century
101–200
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,891
1891 years before 2026.
In other calendars
- Hebrew
-
3895 / 3896 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Wood zodiac:Pig
Sexagenary cycle position 12 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
678 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
127 / 128 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
57 / 56 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 3 × 5
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√135 = [11; (1, 1, 1, 1, 1, 1, 1, 22)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-five
- Ordinal
- 135th
- Roman numeral
- CXXXV
- Binary
- 10000111
- Octal
- 207
- Hexadecimal
- 0x87
- Base64
- hw==
- One's complement
- 120 (8-bit)
- Scientific notation
- 1.35 × 10²
- As a duration
- 135 s = 2 minutes, 15 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ρλεʹ
- Mayan (base 20)
- 𝋦·𝋯
- Chinese
- 一百三十五
- Chinese (financial)
- 壹佰參拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 135 = 8
- e — Euler's number (e)
- Digit 135 = 4
- φ — Golden ratio (φ)
- Digit 135 = 3
- √2 — Pythagoras's (√2)
- Digit 135 = 3
- ln 2 — Natural log of 2
- Digit 135 = 3
- γ — Euler-Mascheroni (γ)
- Digit 135 = 4
Also seen as
UTF-8 encoding: C2 87 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.135.
- Address
- 0.0.0.135
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.0.135
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 135 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯3 (138.6 Hz, -45¢ — about midway to C3)
- Scientific pitch (C4 = 256 Hz): C♯3 (135.6 Hz, -8¢)
- Baroque pitch (A4 = 415 Hz): D3 (138.5 Hz, -44¢)
135° is 3π/4 radians.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.