145,742
145,742 is a composite number, even.
145,742 (one hundred forty-five thousand seven hundred forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 72,871. Written other ways, in hexadecimal, 0x2394E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 1,120
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 247,541
- Recamán's sequence
- a(216,932) = 145,742
- Square (n²)
- 21,240,730,564
- Cube (n³)
- 3,095,666,553,858,488
- Divisor count
- 4
- σ(n) — sum of divisors
- 218,616
- φ(n) — Euler's totient
- 72,870
- Sum of prime factors
- 72,873
Primality
Prime factorization: 2 × 72871
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,742 = [381; (1, 3, 5, 11, 4, 1, 6, 1, 1, 1, 1, 3, 1, 2, 6, 17, 1, 1, 2, 44, 1, 1, 15, 1, …)]
Representations
- In words
- one hundred forty-five thousand seven hundred forty-two
- Ordinal
- 145742nd
- Binary
- 100011100101001110
- Octal
- 434516
- Hexadecimal
- 0x2394E
- Base64
- AjlO
- One's complement
- 4,294,821,553 (32-bit)
- Scientific notation
- 1.45742 × 10⁵
- As a duration
- 145,742 s = 1 day, 16 hours, 29 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρμεψμβʹ
- Mayan (base 20)
- 𝋲·𝋤·𝋧·𝋢
- Chinese
- 一十四萬五千七百四十二
- Chinese (financial)
- 壹拾肆萬伍仟柒佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145742, here are decompositions:
- 19 + 145723 = 145742
- 61 + 145681 = 145742
- 109 + 145633 = 145742
- 139 + 145603 = 145742
- 193 + 145549 = 145742
- 199 + 145543 = 145742
- 211 + 145531 = 145742
- 229 + 145513 = 145742
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 A5 8E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.57.78.
- Address
- 0.2.57.78
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.57.78
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 145,742 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.