155,120
155,120 is a composite number, even.
155,120 (one hundred fifty-five thousand one hundred twenty) is an even 6-digit number. It is a composite number with 40 divisors, and factors as 2⁴ × 5 × 7 × 277. Its proper divisors sum to 258,544, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x25DF0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 21,551
- Recamán's sequence
- a(477,879) = 155,120
- Square (n²)
- 24,062,214,400
- Cube (n³)
- 3,732,530,697,728,000
- Divisor count
- 40
- σ(n) — sum of divisors
- 413,664
- φ(n) — Euler's totient
- 52,992
- Sum of prime factors
- 297
Primality
Prime factorization: 2 4 × 5 × 7 × 277
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,120 = [393; (1, 5, 1, 3, 1, 4, 10, 6, 2, 2, 2, 1, 13, 1, 1, 1, 1, 1, 1, 48, 1, 1, 1, 1, …)]
Period length 40 — the block in parentheses repeats forever.
Representations
- In words
- one hundred fifty-five thousand one hundred twenty
- Ordinal
- 155120th
- Binary
- 100101110111110000
- Octal
- 456760
- Hexadecimal
- 0x25DF0
- Base64
- Al3w
- One's complement
- 4,294,812,175 (32-bit)
- Scientific notation
- 1.5512 × 10⁵
- As a duration
- 155,120 s = 1 day, 19 hours, 5 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρνερκʹ
- Mayan (base 20)
- 𝋳·𝋧·𝋰·𝋠
- Chinese
- 一十五萬五千一百二十
- Chinese (financial)
- 壹拾伍萬伍仟壹佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155120, here are decompositions:
- 37 + 155083 = 155120
- 73 + 155047 = 155120
- 103 + 155017 = 155120
- 139 + 154981 = 155120
- 193 + 154927 = 155120
- 223 + 154897 = 155120
- 271 + 154849 = 155120
- 313 + 154807 = 155120
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 B7 B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.93.240.
- Address
- 0.2.93.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.93.240
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 155,120 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.