138,172
138,172 is a composite number, even.
138,172 (one hundred thirty-eight thousand one hundred seventy-two) is an even 6-digit number. It is a composite number with 6 divisors, and factors as 2² × 34,543. Written other ways, in hexadecimal, 0x21BBC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 336
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 271,831
- Recamán's sequence
- a(492,483) = 138,172
- Square (n²)
- 19,091,501,584
- Cube (n³)
- 2,637,910,956,864,448
- Divisor count
- 6
- σ(n) — sum of divisors
- 241,808
- φ(n) — Euler's totient
- 69,084
- Sum of prime factors
- 34,547
Primality
Prime factorization: 2 2 × 34543
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,172 = [371; (1, 2, 1, 1, 30, 2, 2, 7, 1, 19, 1, 3, 2, 1, 8, 1, 2, 1, 1, 5, 17, 9, 8, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand one hundred seventy-two
- Ordinal
- 138172nd
- Binary
- 100001101110111100
- Octal
- 415674
- Hexadecimal
- 0x21BBC
- Base64
- Ahu8
- One's complement
- 4,294,829,123 (32-bit)
- Scientific notation
- 1.38172 × 10⁵
- As a duration
- 138,172 s = 1 day, 14 hours, 22 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληροβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋨·𝋬
- Chinese
- 一十三萬八千一百七十二
- Chinese (financial)
- 壹拾參萬捌仟壹佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138172, here are decompositions:
- 29 + 138143 = 138172
- 59 + 138113 = 138172
- 71 + 138101 = 138172
- 101 + 138071 = 138172
- 113 + 138059 = 138172
- 131 + 138041 = 138172
- 173 + 137999 = 138172
- 179 + 137993 = 138172
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AE BC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.188.
- Address
- 0.2.27.188
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.188
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 138,172 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138172 first appears in π at position 613,870 of the decimal expansion (the 613,870ordinal-suffix:th 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.