Recognised as Number
-142
- Negative
- Even
- 3 digits
-142 is an even 3-digit integer and the negative of 142. It has 4 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignNegative
Absolute value142
Digit count3
Digit sum7
Digit product8
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Factors & divisors
Prime factorisation−1 × 2 × 71
Distinct prime factors22, 71
Number of divisors4
Sum of divisors σ(n)216
SquarefreeYesno repeated prime factor
All divisors1, 2, 71, 1424 in total
Arithmetic
Representations
Decimal-142
Binary100011108 bits
Octal216
Hexadecimal8E
Base 363Y
In wordsminus one hundred and forty-two
Ordinalminus one hundred and forty-second
Scientific notation-1.42 × 10^2
Engineering notation-142
In other bases
Ternary12021base 3; the most digit-efficient integer base after e: 5 digits
Quinary1032base 5; one hand: 4 digits
Septenary262base 7: 3 digits
Nonary167base 9; each digit is two ternary digits: 3 digits
Duodecimalbabase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 2 digits
Vigesimal72base 20; hands and feet, and the Mayan and Yoruba systems: 2 digits
Sexagesimal2:22base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternaryT11T1Tdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary10110110base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
1111111101110010
Bit length8 bitsto write the magnitude
Set bits4the population count, or Hamming weight
Zero bits4within that length
Bit parityeven4 set bits, so even; not the same as the number itself being even
Highest set bitbit 7worth 128
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes18e
Gray code11001001n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit1111111101110010two's complement
32-bit11111111111111111111111101110010two's complement
64-bit1111111111111111111111111111111111111111111111111111111101110010two's complement
One's complement0000000010001101at 16 bits, every bit flipped
Bits reversed0100111011111111at 16 bits
Rotated left by 11111111011100101at 16 bits, wrapping
Shifted left by 1-100011100= -284, no wrap
Shifted right by 1-1000111= -71, discarding the low bit
These bits as a double7.01573217 × 10^-322≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Powers & multiples
-142 to the power 220,164
-142 to the power 3-2,863,288
-142 to the power 4406,586,896
-142 to the power 5-57,735,339,232
First ten multiples-142, -284, -426, -568, -710, -852, -994, -1,136, -1,278, -1,420
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5No, remainder 2
Divisible by 6No, remainder 4
Divisible by 7No, remainder 2
Divisible by 8No, remainder 6
Divisible by 9No, remainder 7
Divisible by 10No, remainder 2
Divisible by 11No, remainder 10
Divisible by 12No, remainder 10
Divisible by 100No, remainder 42
As a percentage & fraction
As a percentage-14,200%
-142% as a decimal-1.42
-142% of 100-142
-142% of 1,000-1,420
As a fraction of 100-142/100
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