145,472
145,472 is a composite number, even.
145,472 (one hundred forty-five thousand four hundred seventy-two) is an even 6-digit number. It is a composite number with 14 divisors, and factors as 2⁶ × 2,273. Written other ways, in hexadecimal, 0x23840.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 1,120
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 274,541
- Recamán's sequence
- a(217,472) = 145,472
- Square (n²)
- 21,162,102,784
- Cube (n³)
- 3,078,493,416,194,048
- Divisor count
- 14
- σ(n) — sum of divisors
- 288,798
- φ(n) — Euler's totient
- 72,704
- Sum of prime factors
- 2,285
Primality
Prime factorization: 2 6 × 2273
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,472 = [381; (2, 2, 4, 1, 1, 1, 6, 1, 3, 5, 3, 4, 2, 1, 23, 1, 10, 1, 23, 1, 2, 4, 3, 5, …)]
Period length 34 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-five thousand four hundred seventy-two
- Ordinal
- 145472nd
- Binary
- 100011100001000000
- Octal
- 434100
- Hexadecimal
- 0x23840
- Base64
- AjhA
- One's complement
- 4,294,821,823 (32-bit)
- Scientific notation
- 1.45472 × 10⁵
- As a duration
- 145,472 s = 1 day, 16 hours, 24 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρμευοβʹ
- Mayan (base 20)
- 𝋲·𝋣·𝋭·𝋬
- Chinese
- 一十四萬五千四百七十二
- Chinese (financial)
- 壹拾肆萬伍仟肆佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145472, here are decompositions:
- 13 + 145459 = 145472
- 31 + 145441 = 145472
- 73 + 145399 = 145472
- 409 + 145063 = 145472
- 463 + 145009 = 145472
- 499 + 144973 = 145472
- 541 + 144931 = 145472
- 643 + 144829 = 145472
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 A1 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.56.64.
- Address
- 0.2.56.64
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.56.64
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 145,472 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.