142,721
142,721 is a composite number, odd.
142,721 (one hundred forty-two thousand seven hundred twenty-one) is an odd 6-digit number. It is a composite number with 6 divisors, and factors as 41 × 59². Written other ways, in hexadecimal, 0x22D81.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 112
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 127,241
- Recamán's sequence
- a(222,974) = 142,721
- Square (n²)
- 20,369,283,841
- Cube (n³)
- 2,907,124,559,071,361
- Divisor count
- 6
- σ(n) — sum of divisors
- 148,722
- φ(n) — Euler's totient
- 136,880
- Sum of prime factors
- 159
Primality
Prime factorization: 41 × 59 2
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,721 = [377; (1, 3, 1, 1, 1, 3, 23, 2, 1, 29, 1, 1, 4, 2, 1, 2, 1, 2, 3, 6, 1, 3, 4, 9, …)]
Representations
- In words
- one hundred forty-two thousand seven hundred twenty-one
- Ordinal
- 142721st
- Binary
- 100010110110000001
- Octal
- 426601
- Hexadecimal
- 0x22D81
- Base64
- Ai2B
- One's complement
- 4,294,824,574 (32-bit)
- Scientific notation
- 1.42721 × 10⁵
- As a duration
- 142,721 s = 1 day, 15 hours, 38 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρμβψκαʹ
- Mayan (base 20)
- 𝋱·𝋰·𝋰·𝋡
- Chinese
- 一十四萬二千七百二十一
- Chinese (financial)
- 壹拾肆萬貳仟柒佰貳拾壹
Also seen as
UTF-8 encoding: F0 A2 B6 81 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.129.
- Address
- 0.2.45.129
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.129
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 142,721 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 142721 first appears in π at position 482,367 of the decimal expansion (the 482,367ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.