142,640
142,640 is a composite number, even.
142,640 (one hundred forty-two thousand six hundred forty) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 5 × 1,783. Its proper divisors sum to 189,184, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22D30.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 46,241
- Recamán's sequence
- a(223,136) = 142,640
- Square (n²)
- 20,346,169,600
- Cube (n³)
- 2,902,177,631,744,000
- Divisor count
- 20
- σ(n) — sum of divisors
- 331,824
- φ(n) — Euler's totient
- 57,024
- Sum of prime factors
- 1,796
Primality
Prime factorization: 2 4 × 5 × 1783
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,640 = [377; (1, 2, 10, 3, 3, 1, 1, 1, 2, 1, 1, 11, 24, 3, 1, 1, 2, 1, 16, 2, 4, 4, 4, 18, …)]
Representations
- In words
- one hundred forty-two thousand six hundred forty
- Ordinal
- 142640th
- Binary
- 100010110100110000
- Octal
- 426460
- Hexadecimal
- 0x22D30
- Base64
- Ai0w
- One's complement
- 4,294,824,655 (32-bit)
- Scientific notation
- 1.4264 × 10⁵
- As a duration
- 142,640 s = 1 day, 15 hours, 37 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρμβχμʹ
- Mayan (base 20)
- 𝋱·𝋰·𝋬·𝋠
- Chinese
- 一十四萬二千六百四十
- Chinese (financial)
- 壹拾肆萬貳仟陸佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 142640, here are decompositions:
- 31 + 142609 = 142640
- 67 + 142573 = 142640
- 73 + 142567 = 142640
- 97 + 142543 = 142640
- 103 + 142537 = 142640
- 139 + 142501 = 142640
- 271 + 142369 = 142640
- 283 + 142357 = 142640
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 B4 B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.48.
- Address
- 0.2.45.48
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.48
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 142,640 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 142640 first appears in π at position 120,185 of the decimal expansion (the 120,185ordinal-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.