742
742 is a composite number, even, a calendar year.
Historical context — 742 AD
Calendar year
Year 742 (DCCXLII) was a common year starting on Monday of the Julian calendar, the 742nd year of the Common Era (CE) and Anno Domini (AD) designations, the 742nd year of the 1st millennium, the 42nd year of the 8th century, and the 3rd year of the 740s decade.
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Historical context — 742 BC
Decade
This article concerns the period 749 BC – 740 BC.
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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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 742
- Ended on
-
Thursday
December 31, 742
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
740s
740–749
- Century
-
8th century
701–800
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,284
1284 years before 2026.
In other calendars
- Hebrew
-
4502 / 4503 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
124 / 125 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Horse
Sexagenary cycle position 19 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1285 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
120 / 121 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
734 / 735 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
664 / 663 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 7 × 53
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- seven hundred forty-two
- Ordinal
- 742nd
- Roman numeral
- DCCXLII
- Binary
- 1011100110
- Octal
- 1346
- Hexadecimal
- 0x2E6
- Base64
- AuY=
- One's complement
- 64,793 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ψμβʹ
- Mayan (base 20)
- 𝋡·𝋱·𝋢
- Chinese
- 七百四十二
- Chinese (financial)
- 柒佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 742 = 4
- e — Euler's number (e)
- Digit 742 = 6
- φ — Golden ratio (φ)
- Digit 742 = 7
- √2 — Pythagoras's (√2)
- Digit 742 = 1
- ln 2 — Natural log of 2
- Digit 742 = 1
- γ — Euler-Mascheroni (γ)
- Digit 742 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 742, here are decompositions:
- 3 + 739 = 742
- 23 + 719 = 742
- 41 + 701 = 742
- 59 + 683 = 742
- 83 + 659 = 742
- 89 + 653 = 742
- 101 + 641 = 742
- 149 + 593 = 742
Showing the first eight; more decompositions exist.
UTF-8 encoding: CB A6 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.230.
- Address
- 0.0.2.230
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.230
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 742 is an active NANP area code (North American Numbering Plan).
- Primary area
- Greater Toronto
- Region
- Ontario
- Country
- Canada
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.