138,401
138,401 is a prime, odd.
138,401 (one hundred thirty-eight thousand four hundred one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x21CA1.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 104,831
- Recamán's sequence
- a(492,025) = 138,401
- Square (n²)
- 19,154,836,801
- Cube (n³)
- 2,651,048,568,095,201
- Divisor count
- 2
- σ(n) — sum of divisors
- 138,402
- φ(n) — Euler's totient
- 138,400
Primality
138,401 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,401 = [372; (43, 1, 3, 3, 1, 1, 1, 4, 3, 1, 8, 1, 1, 6, 8, 1, 1, 1, 1, 148, 4, 1, 7, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred one
- Ordinal
- 138401st
- Binary
- 100001110010100001
- Octal
- 416241
- Hexadecimal
- 0x21CA1
- Base64
- Ahyh
- One's complement
- 4,294,828,894 (32-bit)
- Scientific notation
- 1.38401 × 10⁵
- As a duration
- 138,401 s = 1 day, 14 hours, 26 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓏺
- Greek (Milesian)
- ͵ρληυαʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋠·𝋡
- Chinese
- 一十三萬八千四百零一
- Chinese (financial)
- 壹拾參萬捌仟肆佰零壹
Also seen as
UTF-8 encoding: F0 A1 B2 A1 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.161.
- Address
- 0.2.28.161
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.161
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 138,401 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 138401 first appears in π at position 459,383 of the decimal expansion (the 459,383ordinal-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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.