142,720
142,720 is a composite number, even.
142,720 (one hundred forty-two thousand seven hundred twenty) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2⁷ × 5 × 223. Its proper divisors sum to 200,000, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22D80.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 16
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 27,241
- Recamán's sequence
- a(222,976) = 142,720
- Square (n²)
- 20,368,998,400
- Cube (n³)
- 2,907,063,451,648,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 342,720
- φ(n) — Euler's totient
- 56,832
- Sum of prime factors
- 242
Primality
Prime factorization: 2 7 × 5 × 223
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,720 = [377; (1, 3, 1, 1, 1, 1, 4, 6, 1, 46, 2, 1, 3, 3, 2, 17, 1, 187, 1, 17, 2, 3, 3, 1, …)]
Period length 36 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-two thousand seven hundred twenty
- Ordinal
- 142720th
- Binary
- 100010110110000000
- Octal
- 426600
- Hexadecimal
- 0x22D80
- Base64
- Ai2A
- One's complement
- 4,294,824,575 (32-bit)
- Scientific notation
- 1.4272 × 10⁵
- As a duration
- 142,720 s = 1 day, 15 hours, 38 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρμβψκʹ
- Mayan (base 20)
- 𝋱·𝋰·𝋰·𝋠
- Chinese
- 一十四萬二千七百二十
- Chinese (financial)
- 壹拾肆萬貳仟柒佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 142720, here are decompositions:
- 23 + 142697 = 142720
- 47 + 142673 = 142720
- 101 + 142619 = 142720
- 113 + 142607 = 142720
- 131 + 142589 = 142720
- 167 + 142553 = 142720
- 173 + 142547 = 142720
- 191 + 142529 = 142720
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 B6 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.128.
- Address
- 0.2.45.128
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.128
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 142,720 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 142720 first appears in π at position 76,225 of the decimal expansion (the 76,225ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.