1,242
1,242 is a composite number, even, a calendar year.
Historical context — 1242 AD
Calendar year
Year 1242 (MCCXLII) was a common year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
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
-
Wednesday
January 1, 1242
- Ended on
-
Wednesday
December 31, 1242
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1240s
1240–1249
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
784
784 years before 2026.
In other calendars
- Hebrew
-
5002 / 5003 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
639 / 640 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Tiger
Sexagenary cycle position 39 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1785 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
620 / 621 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1234 / 1235 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1164 / 1163 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 9
- Digit product
- 16
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 2,421
- Recamán's sequence
- a(8,504) = 1,242
- Square (n²)
- 1,542,564
- Cube (n³)
- 1,915,864,488
- Divisor count
- 16
- σ(n) — sum of divisors
- 2,880
- φ(n) — Euler's totient
- 396
- Sum of prime factors
- 34
Primality
Prime factorization: 2 × 3 3 × 23
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred forty-two
- Ordinal
- 1242nd
- Roman numeral
- MCCXLII
- Binary
- 10011011010
- Octal
- 2332
- Hexadecimal
- 0x4DA
- Base64
- BNo=
- One's complement
- 64,293 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ασμβʹ
- Mayan (base 20)
- 𝋣·𝋢·𝋢
- Chinese
- 一千二百四十二
- Chinese (financial)
- 壹仟貳佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,242 = 4
- e — Euler's number (e)
- Digit 1,242 = 8
- φ — Golden ratio (φ)
- Digit 1,242 = 2
- √2 — Pythagoras's (√2)
- Digit 1,242 = 3
- ln 2 — Natural log of 2
- Digit 1,242 = 1
- γ — Euler-Mascheroni (γ)
- Digit 1,242 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1242, here are decompositions:
- 5 + 1237 = 1242
- 11 + 1231 = 1242
- 13 + 1229 = 1242
- 19 + 1223 = 1242
- 29 + 1213 = 1242
- 41 + 1201 = 1242
- 61 + 1181 = 1242
- 71 + 1171 = 1242
Showing the first eight; more decompositions exist.
UTF-8 encoding: D3 9A (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.218.
- Address
- 0.0.4.218
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.218
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1242 first appears in π at position 9,481 of the decimal expansion (the 9,481ordinal-suffix:st digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.