Number
1,071
- Positive
- Odd
- Composite
- 4 digits
1,071 is an odd 4-digit integer and a composite number. It has 12 divisors and a digital root of 9.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value1,071
Digit count4
Digit sum9
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation3^2 × 7 × 17
Distinct prime factors33, 7, 17
Number of divisors12
Sum of divisors σ(n)1,872
Aliquot sum801sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)576integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1,07112 in total
Arithmetic
Representations
Decimal1,071
Binary1000010111111 bits
Octal2057
Hexadecimal42F
Base 36TR
Roman numeralMLXXI
In wordsone thousand and seventy-one
Ordinalone thousand and seventy-first
Scientific notation1.071 × 10^3
Engineering notation1.071 × 10^3
Nearest landmarks
Powers & multiples
1,071 to the power 21,147,041
1,071 to the power 31,228,480,911
1,071 to the power 41,315,703,055,681
1,071 to the power 51,409,117,972,634,351
First ten multiples1,071, 2,142, 3,213, 4,284, 5,355, 6,426, 7,497, 8,568, 9,639, 10,710
Powers of twoBetween 2^10 (1,024) and 2^11 (2,048)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 3
Divisible by 5No, remainder 1
Divisible by 6No, remainder 3
Divisible by 7Yes
Divisible by 8No, remainder 7
Divisible by 9Yes
Divisible by 10No, remainder 1
Divisible by 11No, remainder 4
Divisible by 12No, remainder 3
Divisible by 100No, remainder 71
Collatz (3n + 1) trajectory
Steps to reach 1168the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps1,071 → 3,214 → 1,607 → 4,822 → 2,411 → 7,234 → 3,617 → 10,852 → 5,426 → 2,713 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage107,100%
1,071% as a decimal10.71
1,071% of 1001,071
1,071% of 1,00010,710
As a fraction of 1001,071/100
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Derived from 1,071
Also reads as
1071 (year)
- Common year
- 365 days
- 11th century
- Pig
1071 was a common year of 365 days. It began on a Sunday and ended on a Sunday. Easter Sunday fell on 26 March.
Structure of the year
Months of 1071
January31 days, starts Sunday
February28 days, starts Wednesday
August31 days, starts Tuesday
September30 days, starts Friday
October31 days, starts Sunday
November30 days, starts Wednesday
December31 days, starts Friday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start-28,369,699,200
Unix timestamp at the end-28,338,163,201
Years from now955 years ago
Days from today349,059 days since 1 January
The number 1071
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Also reads as
#110077 (colour)
- #110077
- Blue
- Dark
- Nearest: Navy
#110077 is a blue with RGB values 17, 0, 119 and HSL 249°, 100%, 23%. It is a dark colour, so white text on it reaches 16.3:1 contrast (AAA for normal text). The nearest named colour is Navy.
Colour values
#110077#110077
HEX#110077
HEX (short)#107
RGBrgb(17, 0, 119)
RGB (0–1)0.0667, 0, 0.4667
RGB percentages6.7%, 0%, 46.7%
HSLhsl(248.6, 100%, 23.3%)
HSV / HSBhsv(248.6, 100%, 46.7%)
CMYK85.7%, 100%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,114,231
CSS custom property--colour: #110077;
Brightness & contrast
Relative luminance0.01451WCAG 2.x, 0 is black and 1 is white
Perceived brightness41.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.28:1
Contrast with white16.28:1WCAG normal text: AAA
Contrast with black1.29:1WCAG normal text: Fail
Greyscale equivalent#0C0C0C
Inverted#EEFF88
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text16.28:1WCAG large text: AAA
Contrast with black, large text1.29:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#667700
Analogous#002B77, #4C0077
Triadic#771100, #007711
Split complementary#774C00, #2B7700
Tetradic#77002B, #667700, #00774C
Tints, shades & saturation
Channel breakdown
R17
G0
B119
Red17 (6.7%)
Green0 (0%)
Blue119 (46.7%)
Hue248.57°
Saturation (HSL)100%
Lightness23.33%
Dominant channelBlue
Hex per channelR 11 · G 00 · B 77
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