Number

4,621

4,621 is a prime, odd.

4,621 (four thousand six hundred twenty-one) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x120D.

Arithmetic Number Centered Triangular Cube-Free Deficient Number Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Squarefree

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

4,609 4,610 4,611 4,612 4,613 4,614 4,615 4,616 4,617 4,618 4,619 4,620 4,621 4,622 4,623 4,624 4,625 4,626 4,627 4,628 4,629 4,630 4,631 4,632 4,633

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 13
Digit product: 48
Digital root: 4
Palindrome: No
Bit width: 13 bits
Reversed: 1,264
Recamán's sequence: a(5,498) = 4,621
Square (n²): 21,353,641
Cube (n³): 98,675,175,061
Divisor count: 2
σ(n) — sum of divisors: 4,622
φ(n) — Euler's totient: 4,620

Primality

4,621 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 4621

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 4,621)

1 × 4621

First multiples

4,621 · 9,242 (double) · 13,863 · 18,484 · 23,105 · 27,726 · 32,347 · 36,968 · 41,589 · 46,210

Sums & aliquot sequence

As a sum of two squares: 30² + 61²

As consecutive integers: 2,310 + 2,311

Continued fraction of √n

√4,621 = [67; (1, 44, 3, 14, 1, 3, 2, 4, 1, 1, 2, 4, 2, 6, 2, 1, 6, 2, 8, 1, 1, 2, 26, 1, …)]

Representations

In words: four thousand six hundred twenty-one
Ordinal: 4621st
Binary: 1001000001101
Octal: 11015
Hexadecimal: 0x120D
Base64: Eg0=
One's complement: 60,914 (16-bit)
Scientific notation: 4.621 × 10³
As a duration: 4,621 s = 1 hour, 17 minutes, 1 second

In other bases

ternary (3) 20100011

quaternary (4) 1020031

quinary (5) 121441

senary (6) 33221

septenary (7) 16321

nonary (9) 6304

undecimal (11) 3521

duodecimal (12) 2811

tridecimal (13) 2146

tetradecimal (14) 1981

pentadecimal (15) 1581

As an angle

4,621° = 12 × 360° + 301°

301° ≈ 5.253 rad

Compass bearing: WNW (west-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵δχκαʹ
Mayan (base 20): 𝋫·𝋫·𝋡
Chinese: 四千六百二十一
Chinese (financial): 肆仟陸佰貳拾壹

In other modern scripts

Eastern Arabic ٤٦٢١ Devanagari ४६२१ Bengali ৪৬২১ Tamil ௪௬௨௧ Thai ๔๖๒๑ Tibetan ༤༦༢༡ Khmer ៤៦២១ Lao ໔໖໒໑ Burmese ၄၆၂၁

Digit at this position in famous constants

π — Pi (π): Digit 4,621 = 3
e — Euler's number (e): Digit 4,621 = 4
φ — Golden ratio (φ): Digit 4,621 = 0
√2 — Pythagoras's (√2): Digit 4,621 = 7
ln 2 — Natural log of 2: Digit 4,621 = 8
γ — Euler-Mascheroni (γ): Digit 4,621 = 1

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 4,603 (gap of 18)
Next prime: 4,637 (gap of 16)

Unicode codepoint

ል

Ethiopic Syllable Le

U+120D

Other letter (Lo)

UTF-8 encoding: E1 88 8D (3 bytes).

Lookup U+120D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00120D

RGB(0, 18, 13)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.18.13.

Address: 0.0.18.13
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.18.13

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 4,621 Hz is closest to:

Concert pitch (A4 = 440 Hz): D8 (4698.6 Hz, -29¢)
Scientific pitch (C4 = 256 Hz): D8 (4597.6 Hz, +9¢)
Baroque pitch (A4 = 415 Hz): D♯8 (4695.2 Hz, -28¢)

Position in π

The digit sequence 4621 first appears in π at position 11,287 of the decimal expansion (the 11,287ordinal-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.

Look up 4621 on Pi Search ↗