145,520
145,520 is a composite number, even.
145,520 (one hundred forty-five thousand five hundred twenty) is an even 6-digit number. It is a composite number with 40 divisors, and factors as 2⁴ × 5 × 17 × 107. Its proper divisors sum to 216,064, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x23870.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 25,541
- Recamán's sequence
- a(217,376) = 145,520
- Square (n²)
- 21,176,070,400
- Cube (n³)
- 3,081,541,764,608,000
- Divisor count
- 40
- σ(n) — sum of divisors
- 361,584
- φ(n) — Euler's totient
- 54,272
- Sum of prime factors
- 137
Primality
Prime factorization: 2 4 × 5 × 17 × 107
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,520 = [381; (2, 8, 13, 1, 3, 15, 3, 5, 1, 46, 1, 5, 3, 15, 3, 1, 13, 8, 2, 762)]
Period length 20 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-five thousand five hundred twenty
- Ordinal
- 145520th
- Binary
- 100011100001110000
- Octal
- 434160
- Hexadecimal
- 0x23870
- Base64
- Ajhw
- One's complement
- 4,294,821,775 (32-bit)
- Scientific notation
- 1.4552 × 10⁵
- As a duration
- 145,520 s = 1 day, 16 hours, 25 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρμεφκʹ
- Mayan (base 20)
- 𝋲·𝋣·𝋰·𝋠
- Chinese
- 一十四萬五千五百二十
- Chinese (financial)
- 壹拾肆萬伍仟伍佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145520, here are decompositions:
- 3 + 145517 = 145520
- 7 + 145513 = 145520
- 19 + 145501 = 145520
- 43 + 145477 = 145520
- 61 + 145459 = 145520
- 79 + 145441 = 145520
- 97 + 145423 = 145520
- 103 + 145417 = 145520
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 A1 B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.56.112.
- Address
- 0.2.56.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.56.112
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 145,520 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.