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Properties of the Number 11821

Eleven Thousand Eight Hundred Twenty-One

Basics

Value: 11820 → 11821 → 11822

Parity: odd

Prime: Yes

Previous Prime: 11813

Next Prime: 11827

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 11821

Divisors: 1, 11821

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111000101101

Octal: 27055

Duodecimal: 6A11

Hexadecimal: 2e2d

Square: 139736041

Square Root: 108.72442227944924

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes p such that continued fraction of (1 + sqrt(p))/2 has period 15: primes in A146338. A146360
Primes p such that p, p+6, p+12, p+18 are all primes. A23271
Numbers k such that (9k + 5k)/14 is prime. A128339
Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d=2,4 or 6) and forming d-pattern=[6, 4,2]; short d-string notation of pattern = [642]. A78855
Balanced primes of order eight. A96700
Numbers k such that 3k + 34 is prime. A219050
a(n) is the number of integers k in range [2n, (2n+1)-1] such that all terms in finite sequence [k, floor(k/2), floor(k/4), floor(k/8), ..., 1] are squarefree. A293230
Number of semiorders on n labeled nodes whose incomparability graph is connected. A48287
Sequence of 2 Pythagorean triangles, each with a leg and hypotenuse prime. The leg of the second triangle is the hypotenuse of the first. A48270
Primes having only {1, 2, 8} as digits. A385775