142,820
142,820 is a composite number, even.
142,820 (one hundred forty-two thousand eight hundred twenty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 37 × 193. Its proper divisors sum to 166,804, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22DE4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 28,241
- Recamán's sequence
- a(222,776) = 142,820
- Square (n²)
- 20,397,552,400
- Cube (n³)
- 2,913,178,433,768,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 309,624
- φ(n) — Euler's totient
- 55,296
- Sum of prime factors
- 239
Primality
Prime factorization: 2 2 × 5 × 37 × 193
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,820 = [377; (1, 10, 1, 4, 3, 2, 1, 1, 1, 3, 1, 1, 4, 1, 7, 7, 2, 1, 4, 3, 11, 2, 188, 2, …)]
Period length 46 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-two thousand eight hundred twenty
- Ordinal
- 142820th
- Binary
- 100010110111100100
- Octal
- 426744
- Hexadecimal
- 0x22DE4
- Base64
- Ai3k
- One's complement
- 4,294,824,475 (32-bit)
- Scientific notation
- 1.4282 × 10⁵
- As a duration
- 142,820 s = 1 day, 15 hours, 40 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρμβωκʹ
- Mayan (base 20)
- 𝋱·𝋱·𝋡·𝋠
- Chinese
- 一十四萬二千八百二十
- Chinese (financial)
- 壹拾肆萬貳仟捌佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 142820, here are decompositions:
- 31 + 142789 = 142820
- 61 + 142759 = 142820
- 109 + 142711 = 142820
- 163 + 142657 = 142820
- 211 + 142609 = 142820
- 229 + 142591 = 142820
- 277 + 142543 = 142820
- 283 + 142537 = 142820
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 B7 A4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.228.
- Address
- 0.2.45.228
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.228
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 142,820 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 142820 first appears in π at position 327,426 of the decimal expansion (the 327,426ordinal-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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.