155,142
155,142 is a composite number, even.
155,142 (one hundred fifty-five thousand one hundred forty-two) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2 × 3³ × 13² × 17. Its proper divisors sum to 240,138, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x25E06.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 200
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 241,551
- Recamán's sequence
- a(477,835) = 155,142
- Square (n²)
- 24,069,040,164
- Cube (n³)
- 3,734,119,029,123,288
- Divisor count
- 48
- σ(n) — sum of divisors
- 395,280
- φ(n) — Euler's totient
- 44,928
- Sum of prime factors
- 54
Primality
Prime factorization: 2 × 3 3 × 13 2 × 17
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,142 = [393; (1, 7, 2, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 15, 2, 4, 5, 1, 1, 1, 9, 1, 1, 2, …)]
Representations
- In words
- one hundred fifty-five thousand one hundred forty-two
- Ordinal
- 155142nd
- Binary
- 100101111000000110
- Octal
- 457006
- Hexadecimal
- 0x25E06
- Base64
- Al4G
- One's complement
- 4,294,812,153 (32-bit)
- Scientific notation
- 1.55142 × 10⁵
- As a duration
- 155,142 s = 1 day, 19 hours, 5 minutes, 42 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρνερμβʹ
- Mayan (base 20)
- 𝋳·𝋧·𝋱·𝋢
- Chinese
- 一十五萬五千一百四十二
- Chinese (financial)
- 壹拾伍萬伍仟壹佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155142, here are decompositions:
- 5 + 155137 = 155142
- 23 + 155119 = 155142
- 59 + 155083 = 155142
- 61 + 155081 = 155142
- 73 + 155069 = 155142
- 139 + 155003 = 155142
- 151 + 154991 = 155142
- 199 + 154943 = 155142
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 B8 86 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.94.6.
- Address
- 0.2.94.6
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.94.6
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 155,142 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 155142 first appears in π at position 684,833 of the decimal expansion (the 684,833ordinal-suffix:rd 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.