138,742
138,742 is a composite number, even.
138,742 (one hundred thirty-eight thousand seven hundred forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 69,371. Written other ways, in hexadecimal, 0x21DF6.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 1,344
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 247,831
- Recamán's sequence
- a(491,343) = 138,742
- Square (n²)
- 19,249,342,564
- Cube (n³)
- 2,670,692,286,014,488
- Divisor count
- 4
- σ(n) — sum of divisors
- 208,116
- φ(n) — Euler's totient
- 69,370
- Sum of prime factors
- 69,373
Primality
Prime factorization: 2 × 69371
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,742 = [372; (2, 12, 1, 1, 3, 12, 1, 1, 3, 1, 1, 1, 105, 1, 3, 1, 1, 1, 1, 4, 2, 5, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand seven hundred forty-two
- Ordinal
- 138742nd
- Binary
- 100001110111110110
- Octal
- 416766
- Hexadecimal
- 0x21DF6
- Base64
- Ah32
- One's complement
- 4,294,828,553 (32-bit)
- Scientific notation
- 1.38742 × 10⁵
- As a duration
- 138,742 s = 1 day, 14 hours, 32 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληψμβʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋱·𝋢
- Chinese
- 一十三萬八千七百四十二
- Chinese (financial)
- 壹拾參萬捌仟柒佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138742, here are decompositions:
- 3 + 138739 = 138742
- 11 + 138731 = 138742
- 59 + 138683 = 138742
- 101 + 138641 = 138742
- 113 + 138629 = 138742
- 173 + 138569 = 138742
- 179 + 138563 = 138742
- 281 + 138461 = 138742
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B7 B6 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.246.
- Address
- 0.2.29.246
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.246
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 138,742 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 138742 first appears in π at position 791,552 of the decimal expansion (the 791,552ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.