145,142
145,142 is a composite number, even.
145,142 (one hundred forty-five thousand one hundred forty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 31 × 2,341. Written other ways, in hexadecimal, 0x236F6.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 160
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 241,541
- Recamán's sequence
- a(218,132) = 145,142
- Square (n²)
- 21,066,200,164
- Cube (n³)
- 3,057,590,424,203,288
- Divisor count
- 8
- σ(n) — sum of divisors
- 224,832
- φ(n) — Euler's totient
- 70,200
- Sum of prime factors
- 2,374
Primality
Prime factorization: 2 × 31 × 2341
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,142 = [380; (1, 39, 9, 1, 1, 1, 1, 1, 2, 2, 5, 1, 57, 1, 3, 3, 2, 1, 3, 2, 21, 1, 32, 5, …)]
Representations
- In words
- one hundred forty-five thousand one hundred forty-two
- Ordinal
- 145142nd
- Binary
- 100011011011110110
- Octal
- 433366
- Hexadecimal
- 0x236F6
- Base64
- Ajb2
- One's complement
- 4,294,822,153 (32-bit)
- Scientific notation
- 1.45142 × 10⁵
- As a duration
- 145,142 s = 1 day, 16 hours, 19 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρμερμβʹ
- Mayan (base 20)
- 𝋲·𝋢·𝋱·𝋢
- Chinese
- 一十四萬五千一百四十二
- Chinese (financial)
- 壹拾肆萬伍仟壹佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145142, here are decompositions:
- 3 + 145139 = 145142
- 73 + 145069 = 145142
- 79 + 145063 = 145142
- 181 + 144961 = 145142
- 211 + 144931 = 145142
- 313 + 144829 = 145142
- 379 + 144763 = 145142
- 433 + 144709 = 145142
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 9B B6 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.54.246.
- Address
- 0.2.54.246
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.54.246
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 145,142 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.