6,401
6,401 is a composite number, odd.
6,401 (six thousand four hundred one) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 37 × 173. Written other ways, in hexadecimal, 0x1901.
Interestingness
Properties
Primality
Prime factorization: 37 × 173
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√6,401 = [80; (160)]
Period length 1 — the block in parentheses repeats forever.
Representations
- In words
- six thousand four hundred one
- Ordinal
- 6401st
- Binary
- 1100100000001
- Octal
- 14401
- Hexadecimal
- 0x1901
- Base64
- GQE=
- One's complement
- 59,134 (16-bit)
- Scientific notation
- 6.401 × 10³
- As a duration
- 6,401 s = 1 hour, 46 minutes, 41 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓏺
- Greek (Milesian)
- ͵ϛυαʹ
- Mayan (base 20)
- 𝋰·𝋠·𝋡
- Chinese
- 六千四百零一
- Chinese (financial)
- 陸仟肆佰零壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 6,401 = 0
- e — Euler's number (e)
- Digit 6,401 = 6
- φ — Golden ratio (φ)
- Digit 6,401 = 9
- √2 — Pythagoras's (√2)
- Digit 6,401 = 3
- ln 2 — Natural log of 2
- Digit 6,401 = 5
- γ — Euler-Mascheroni (γ)
- Digit 6,401 = 7
Also seen as
UTF-8 encoding: E1 A4 81 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.25.1.
- Address
- 0.0.25.1
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.25.1
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 6,401 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G8 (6271.9 Hz, +35¢)
- Scientific pitch (C4 = 256 Hz): G♯8 (6502 Hz, -27¢)
- Baroque pitch (A4 = 415 Hz): G♯8 (6267.3 Hz, +37¢)
The digit sequence 6401 first appears in π at position 2,077 of the decimal expansion (the 2,077ordinal-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.