Number

1,745

1,745 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Evil Number Happy Number Recamán's Sequence Semiprime Squarefree Year

Notable events — 1745 AD

May 11 France defeats an Anglo-Allied army at Fontenoy.
Jun 28 British colonial forces capture Louisbourg.
Aug 19 Charles Edward Stuart raises the Jacobite standard, beginning the 1745 Rising.

Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0

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: Friday
January 1, 1745
Ended on: Friday
December 31, 1745
Friday the 13ths: 1
One Friday the 13th this year.
Easter Sunday: April 18
Sunday, April 18, 1745
Decade: 1740s
1740–1749
Century: 18th century
1701–1800
Millennium: 2nd millennium
1001–2000
Years ago: 281
281 years before 2026.

In other calendars

Hebrew: 5505 / 5506 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1157 / 1158 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Ox
Sexagenary cycle position 2 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 2288 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 1123 / 1124 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1737 / 1738 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1667 / 1666 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 17
Digit product: 140
Digital root: 8
Palindrome: No
Bit width: 11 bits
Reversed: 5,471
Recamán's sequence: a(16,209) = 1,745
Square (n²): 3,045,025
Cube (n³): 5,313,568,625
Divisor count: 4
σ(n) — sum of divisors: 2,100
φ(n) — Euler's totient: 1,392
Sum of prime factors: 354

Primality

Prime factorization: 5 × 349

Nearest primes: 1,741 (−4) · 1,747 (+2)

Divisors & multiples

All divisors (4)

1 · 5 · 349 · 1745

Aliquot sum (sum of proper divisors): 355

Factor pairs (a × b = 1,745)

1 × 1745

5 × 349

First multiples

1,745 · 3,490 (double) · 5,235 · 6,980 · 8,725 · 10,470 · 12,215 · 13,960 · 15,705 · 17,450

Sums & aliquot sequence

As a sum of two squares: 8² + 41² = 28² + 31²

As consecutive integers: 872 + 873 347 + 348 + 349 + 350 + 351 170 + 171 + … + 179

Aliquot sequence: 1,745 → 355 → 77 → 19 → 1 → 0 — terminates at zero

Representations

In words: one thousand seven hundred forty-five
Ordinal: 1745th
Roman numeral: MDCCXLV
Binary: 11011010001
Octal: 3321
Hexadecimal: 0x6D1
Base64: BtE=
One's complement: 63,790 (16-bit)

In other bases

ternary (3) 2101122

quaternary (4) 123101

quinary (5) 23440

senary (6) 12025

septenary (7) 5042

nonary (9) 2348

undecimal (11) 1347

duodecimal (12) 1015

tridecimal (13) a43

tetradecimal (14) 8c9

pentadecimal (15) 7b5

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵αψμεʹ
Mayan (base 20): 𝋤·𝋧·𝋥
Chinese: 一千七百四十五
Chinese (financial): 壹仟柒佰肆拾伍

In other modern scripts

Eastern Arabic ١٧٤٥ Devanagari १७४५ Bengali ১৭৪৫ Tamil ௧௭௪௫ Thai ๑๗๔๕ Tibetan ༡༧༤༥ Khmer ១៧៤៥ Lao ໑໗໔໕ Burmese ၁၇၄၅

Digit at this position in famous constants

π — Pi (π): Digit 1,745 = 5
e — Euler's number (e): Digit 1,745 = 7
φ — Golden ratio (φ): Digit 1,745 = 1
√2 — Pythagoras's (√2): Digit 1,745 = 6
ln 2 — Natural log of 2: Digit 1,745 = 5
γ — Euler-Mascheroni (γ): Digit 1,745 = 0

Also seen as

Unicode codepoint

Arabic Letter Yeh With Three Dots Below

U+06D1

Other letter (Lo)

UTF-8 encoding: DB 91 (2 bytes).

Lookup U+06D1 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0006D1

RGB(0, 6, 209)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.209.

Address: 0.0.6.209
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.6.209

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

Position in π

The digit sequence 1745 first appears in π at position 155 of the decimal expansion (the 155ordinal-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 1745 on Pi Search ↗