Number

1,401

1,401 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Odious Number Pernicious Number Recamán's Sequence Self Number Semiprime Squarefree Year

Historical context — 1401 AD

Calendar year

Year 1401 (MCDI) was a common year starting on Saturday 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 1401
Ended on: Thursday
December 31, 1401
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 1400s
1400–1409
Century: 15th century
1401–1500
Millennium: 2nd millennium
1001–2000
Years ago: 625
625 years before 2026.

In other calendars

Hebrew: 5161 / 5162 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 803 / 804 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Metal zodiac:Snake
Sexagenary cycle position 18 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1944 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 779 / 780 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1393 / 1394 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1323 / 1322 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 6
Digit product: 0
Digital root: 6
Palindrome: No
Bit width: 11 bits
Reversed: 1,041
Recamán's sequence: a(8,326) = 1,401
Square (n²): 1,962,801
Cube (n³): 2,749,884,201
Divisor count: 4
σ(n) — sum of divisors: 1,872
φ(n) — Euler's totient: 932
Sum of prime factors: 470

Primality

Prime factorization: 3 × 467

Nearest primes: 1,399 (−2) · 1,409 (+8)

Divisors & multiples

All divisors (4)

1 · 3 · 467 · 1401

Aliquot sum (sum of proper divisors): 471

Factor pairs (a × b = 1,401)

1 × 1401

3 × 467

First multiples

1,401 · 2,802 (double) · 4,203 · 5,604 · 7,005 · 8,406 · 9,807 · 11,208 · 12,609 · 14,010

Sums & aliquot sequence

As consecutive integers: 700 + 701 466 + 467 + 468 231 + 232 + 233 + 234 + 235 + 236

Aliquot sequence: 1,401 → 471 → 161 → 31 → 1 → 0 — terminates at zero

Representations

In words: one thousand four hundred one
Ordinal: 1401st
Roman numeral: MCDI
Binary: 10101111001
Octal: 2571
Hexadecimal: 0x579
Base64: BXk=
One's complement: 64,134 (16-bit)

In other bases

ternary (3) 1220220

quaternary (4) 111321

quinary (5) 21101

senary (6) 10253

septenary (7) 4041

nonary (9) 1826

undecimal (11) 1064

duodecimal (12) 989

tridecimal (13) 83a

tetradecimal (14) 721

pentadecimal (15) 636

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓏺
Greek (Milesian): ͵αυαʹ
Mayan (base 20): 𝋣·𝋪·𝋡
Chinese: 一千四百零一
Chinese (financial): 壹仟肆佰零壹

In other modern scripts

Eastern Arabic ١٤٠١ Devanagari १४०१ Bengali ১৪০১ Tamil ௧௪௦௧ Thai ๑๔๐๑ Tibetan ༡༤༠༡ Khmer ១៤០១ Lao ໑໔໐໑ Burmese ၁၄၀၁

Digit at this position in famous constants

π — Pi (π): Digit 1,401 = 9
e — Euler's number (e): Digit 1,401 = 8
φ — Golden ratio (φ): Digit 1,401 = 2
√2 — Pythagoras's (√2): Digit 1,401 = 1
ln 2 — Natural log of 2: Digit 1,401 = 6
γ — Euler-Mascheroni (γ): Digit 1,401 = 1

Also seen as

Unicode codepoint

Armenian Small Letter Cha

U+0579

Lowercase letter (Ll)

UTF-8 encoding: D5 B9 (2 bytes).

Lookup U+0579 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000579

RGB(0, 5, 121)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.121.

Address: 0.0.5.121
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.5.121

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

Position in π

The digit sequence 1401 first appears in π at position 3,250 of the decimal expansion (the 3,250ordinal-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 1401 on Pi Search ↗