Number

1,371

1,371 is a composite number, odd, a calendar year.

1,371 (one thousand three hundred seventy-one) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 3 × 457. Written other ways, in Roman numerals it is MCCCLXXI and in binary, 10101011011.

Arithmetic Number Cube-Free Deficient Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

1,359 1,360 1,361 1,362 1,363 1,364 1,365 1,366 1,367 1,368 1,369 1,370 1,371 1,372 1,373 1,374 1,375 1,376 1,377 1,378 1,379 1,380 1,381 1,382 1,383

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Historical context — 1371 AD

Calendar year

Year 1371 (MCCCLXXI) was a common year starting on Wednesday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 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: Tuesday
January 1, 1371
Ended on: Tuesday
December 31, 1371
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 1370s
1370–1379
Century: 14th century
1301–1400
Millennium: 2nd millennium
1001–2000
Years ago: 655
655 years before 2026.

In other calendars

Hebrew: 5131 / 5132 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 772 / 773 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Metal zodiac:Pig
Sexagenary cycle position 48 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1914 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 749 / 750 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1363 / 1364 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1293 / 1292 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 12
Digit product: 21
Digital root: 3
Palindrome: No
Bit width: 11 bits
Reversed: 1,731
Recamán's sequence: a(8,386) = 1,371
Square (n²): 1,879,641
Cube (n³): 2,576,987,811
Divisor count: 4
σ(n) — sum of divisors: 1,832
φ(n) — Euler's totient: 912
Sum of prime factors: 460

Primality

Prime factorization: 3 × 457

Nearest primes: 1,367 (−4) · 1,373 (+2)

Divisors & multiples

All divisors (4)

1 · 3 · 457 · 1371

Aliquot sum (sum of proper divisors): 461

Factor pairs (a × b = 1,371)

1 × 1371

3 × 457

First multiples

1,371 · 2,742 (double) · 4,113 · 5,484 · 6,855 · 8,226 · 9,597 · 10,968 · 12,339 · 13,710

Sums & aliquot sequence

As consecutive integers: 685 + 686 456 + 457 + 458 226 + 227 + 228 + 229 + 230 + 231

Aliquot sequence: 1,371 → 461 → 1 → 0 — terminates at zero

Continued fraction of √n

√1,371 = [37; (37, 74)]

Period length 2 — the block in parentheses repeats forever.

Representations

In words: one thousand three hundred seventy-one
Ordinal: 1371st
Roman numeral: MCCCLXXI
Binary: 10101011011
Octal: 2533
Hexadecimal: 0x55B
Base64: BVs=
One's complement: 64,164 (16-bit)
Scientific notation: 1.371 × 10³
As a duration: 1,371 s = 22 minutes, 51 seconds

In other bases

ternary (3) 1212210

quaternary (4) 111123

quinary (5) 20441

senary (6) 10203

septenary (7) 3666

nonary (9) 1783

undecimal (11) 1037

duodecimal (12) 963

tridecimal (13) 816

tetradecimal (14) 6dd

pentadecimal (15) 616

Palindromic in base 15

As an angle

1,371° = 3 × 360° + 291°

291° ≈ 5.079 rad

Compass bearing: WNW (west-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵ατοαʹ
Mayan (base 20): 𝋣·𝋨·𝋫
Chinese: 一千三百七十一
Chinese (financial): 壹仟參佰柒拾壹

In other modern scripts

Eastern Arabic ١٣٧١ Devanagari १३७१ Bengali ১৩৭১ Tamil ௧௩௭௧ Thai ๑๓๗๑ Tibetan ༡༣༧༡ Khmer ១៣៧១ Lao ໑໓໗໑ Burmese ၁၃၇၁

Digit at this position in famous constants

π — Pi (π): Digit 1,371 = 4
e — Euler's number (e): Digit 1,371 = 8
φ — Golden ratio (φ): Digit 1,371 = 8
√2 — Pythagoras's (√2): Digit 1,371 = 9
ln 2 — Natural log of 2: Digit 1,371 = 0
γ — Euler-Mascheroni (γ): Digit 1,371 = 6

Also seen as

Unicode codepoint

Armenian Emphasis Mark

U+055B

Other punctuation (Po)

UTF-8 encoding: D5 9B (2 bytes).

Lookup U+055B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00055B

RGB(0, 5, 91)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.91.

Address: 0.0.5.91
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.5.91

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 1,371 Hz is closest to:

Concert pitch (A4 = 440 Hz): F6 (1396.9 Hz, -32¢)
Scientific pitch (C4 = 256 Hz): F6 (1366.9 Hz, +5¢)
Baroque pitch (A4 = 415 Hz): F♯6 (1395.9 Hz, -31¢)

Position in π

The digit sequence 1371 first appears in π at position 13,707 of the decimal expansion (the 13,707ordinal-suffix:th 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.

Look up 1371 on Pi Search ↗