145,172
145,172 is a composite number, even.
145,172 (one hundred forty-five thousand one hundred seventy-two) is an even 6-digit number. It is a composite number with 6 divisors, and factors as 2² × 36,293. Written other ways, in hexadecimal, 0x23714.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 280
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 271,541
- Recamán's sequence
- a(218,072) = 145,172
- Square (n²)
- 21,074,909,584
- Cube (n³)
- 3,059,486,774,128,448
- Divisor count
- 6
- σ(n) — sum of divisors
- 254,058
- φ(n) — Euler's totient
- 72,584
- Sum of prime factors
- 36,297
Primality
Prime factorization: 2 2 × 36293
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√145,172 = [381; (69, 3, 1, 1, 1, 5, 1, 1, 1, 19, 1, 17, 1, 1, 1, 2, 1, 3, 1, 2, 2, 1, 2, 10, …)]
Representations
- In words
- one hundred forty-five thousand one hundred seventy-two
- Ordinal
- 145172nd
- Binary
- 100011011100010100
- Octal
- 433424
- Hexadecimal
- 0x23714
- Base64
- AjcU
- One's complement
- 4,294,822,123 (32-bit)
- Scientific notation
- 1.45172 × 10⁵
- As a duration
- 145,172 s = 1 day, 16 hours, 19 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρμεροβʹ
- Mayan (base 20)
- 𝋲·𝋢·𝋲·𝋬
- Chinese
- 一十四萬五千一百七十二
- Chinese (financial)
- 壹拾肆萬伍仟壹佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 145172, here are decompositions:
- 103 + 145069 = 145172
- 109 + 145063 = 145172
- 151 + 145021 = 145172
- 163 + 145009 = 145172
- 199 + 144973 = 145172
- 211 + 144961 = 145172
- 241 + 144931 = 145172
- 283 + 144889 = 145172
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 9C 94 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.55.20.
- Address
- 0.2.55.20
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.55.20
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 145,172 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 145172 first appears in π at position 916,472 of the decimal expansion (the 916,472ordinal-suffix:nd 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.