1,021,440
1,021,440 is a composite number, even.
1,021,440 (one million twenty-one thousand four hundred forty) is an even 7-digit number. It is a composite number with 160 divisors, and factors as 2⁹ × 3 × 5 × 7 × 19. Its proper divisors sum to 2,906,880, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF9600.
Interestingness
Properties
- Parity
- Even
- Digit count
- 7
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 441,201
- Square (n²)
- 1,043,339,673,600
- Cube (n³)
- 1,065,708,876,201,984,000
- Divisor count
- 160
- σ(n) — sum of divisors
- 3,928,320
- φ(n) — Euler's totient
- 221,184
- Sum of prime factors
- 52
Primality
Prime factorization: 2 9 × 3 × 5 × 7 × 19
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,021,440 = [1010; (1, 1, 1, 30, 1, 10, 1, 125, 2, 2, 2, 31, 6, 505, 6, 31, 2, 2, 2, 125, 1, 10, 1, 30, …)]
Period length 28 — the block in parentheses repeats forever.
Representations
- In words
- one million twenty-one thousand four hundred forty
- Ordinal
- 1021440th
- Binary
- 11111001011000000000
- Octal
- 3713000
- Hexadecimal
- 0xF9600
- Base64
- D5YA
- One's complement
- 4,293,945,855 (32-bit)
- Scientific notation
- 1.02144 × 10⁶
- As a duration
- 1,021,440 s = 11 days, 19 hours, 44 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓁨𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Chinese
- 一百零二萬一千四百四十
- Chinese (financial)
- 壹佰零貳萬壹仟肆佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1021440, here are decompositions:
- 11 + 1021429 = 1021440
- 23 + 1021417 = 1021440
- 37 + 1021403 = 1021440
- 53 + 1021387 = 1021440
- 59 + 1021381 = 1021440
- 67 + 1021373 = 1021440
- 71 + 1021369 = 1021440
- 73 + 1021367 = 1021440
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.150.0.
- Address
- 0.15.150.0
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.150.0
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Could be parsed as a date. Most likely interpretation: Thursday, January 2, 1440 (MDDYYYY (US, single-digit month)).
Other possible interpretations (3)
- 1440-02-01 (DMMYYYY (Euro, single-digit day))
- 1440-10-02 (MMDYYYY (US, single-digit day))
- 1440-02-10 (DDMYYYY (Euro, single-digit month))
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 1,021,440 and was likely granted around 1912.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 1021440 first appears in π at position 829,211 of the decimal expansion (the 829,211ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.