142,840
142,840 is a composite number, even.
142,840 (one hundred forty-two thousand eight hundred forty) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2³ × 5 × 3,571. Its proper divisors sum to 178,640, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22DF8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 48,241
- Recamán's sequence
- a(222,736) = 142,840
- Square (n²)
- 20,403,265,600
- Cube (n³)
- 2,914,402,458,304,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 321,480
- φ(n) — Euler's totient
- 57,120
- Sum of prime factors
- 3,582
Primality
Prime factorization: 2 3 × 5 × 3571
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,840 = [377; (1, 16, 5, 1, 1, 5, 1, 2, 2, 1, 4, 3, 3, 2, 18, 1, 17, 1, 18, 2, 3, 3, 4, 1, …)]
Period length 34 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-two thousand eight hundred forty
- Ordinal
- 142840th
- Binary
- 100010110111111000
- Octal
- 426770
- Hexadecimal
- 0x22DF8
- Base64
- Ai34
- One's complement
- 4,294,824,455 (32-bit)
- Scientific notation
- 1.4284 × 10⁵
- As a duration
- 142,840 s = 1 day, 15 hours, 40 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρμβωμʹ
- Mayan (base 20)
- 𝋱·𝋱·𝋢·𝋠
- Chinese
- 一十四萬二千八百四十
- Chinese (financial)
- 壹拾肆萬貳仟捌佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 142840, here are decompositions:
- 3 + 142837 = 142840
- 29 + 142811 = 142840
- 41 + 142799 = 142840
- 53 + 142787 = 142840
- 83 + 142757 = 142840
- 107 + 142733 = 142840
- 167 + 142673 = 142840
- 233 + 142607 = 142840
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 B7 B8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.248.
- Address
- 0.2.45.248
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.248
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 142,840 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.