145,040
145,040 is a composite number, even.
145,040 (one hundred forty-five thousand forty) is an even 6-digit number. It is a composite number with 60 divisors, and factors as 2⁴ × 5 × 7² × 37. Its proper divisors sum to 257,836, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x23690.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 40,541
- Recamán's sequence
- a(218,336) = 145,040
- Square (n²)
- 21,036,601,600
- Cube (n³)
- 3,051,148,696,064,000
- Divisor count
- 60
- σ(n) — sum of divisors
- 402,876
- φ(n) — Euler's totient
- 48,384
- Sum of prime factors
- 64
Primality
Prime factorization: 2 4 × 5 × 7 2 × 37
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,040 = [380; (1, 5, 3, 2, 1, 1, 1, 14, 1, 10, 1, 3, 1, 1, 2, 3, 1, 14, 1, 3, 2, 1, 1, 3, …)]
Period length 36 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-five thousand forty
- Ordinal
- 145040th
- Binary
- 100011011010010000
- Octal
- 433220
- Hexadecimal
- 0x23690
- Base64
- AjaQ
- One's complement
- 4,294,822,255 (32-bit)
- Scientific notation
- 1.4504 × 10⁵
- As a duration
- 145,040 s = 1 day, 16 hours, 17 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρμεμʹ
- Mayan (base 20)
- 𝋲·𝋢·𝋬·𝋠
- Chinese
- 一十四萬五千零四十
- Chinese (financial)
- 壹拾肆萬伍仟零肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145040, here are decompositions:
- 3 + 145037 = 145040
- 19 + 145021 = 145040
- 31 + 145009 = 145040
- 67 + 144973 = 145040
- 73 + 144967 = 145040
- 79 + 144961 = 145040
- 109 + 144931 = 145040
- 151 + 144889 = 145040
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 9A 90 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.54.144.
- Address
- 0.2.54.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.54.144
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 145,040 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 145040 first appears in π at position 71,001 of the decimal expansion (the 71,001ordinal-suffix:st 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.