Properties of the Number 11900

Eleven Thousand Nine Hundred

Basics

Value: 11899 → 11900 → 11901

Parity: even

Prime: No

Previous Prime: 11897

Next Prime: 11903

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 ² × 7 × 17

Divisors: 1, 2, 4, 5, 7, 10, 14, 17, 20, 25

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111001111100

Octal: 27174

Duodecimal: 6A78

Hexadecimal: 2e7c

Square: 141610000

Square Root: 109.08712114635715

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

Number of distinct values taken by 4⁴^...⁴ (with n 4's and parentheses inserted in all possible ways). A3019

a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n+1-k), where k = floor((n+1)/2), s = (natural numbers >= 3). A24312

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal. A232515

T(n, k) = [x^k] ∑_k=0..n Stirling2(n, k)*RisingFactorial(x, k), triangle read by rows, for n >= 0 and 0 <= k <= n. A129062

5 times pentagonal numbers: 5·n*(3·n-1)/2. A152734

a(n) = E(k)*C(n+k,k) = Euler(k)*binomial(n+k,k) for k=4. A154286

Number of (w,x,y) with all terms in {0,...,n} and |w-x| < |x-y| < |y-w|. A212964

Expansion of q^-1/6 * η(q²)³ / η(q)² in powers of q. A85140

Numbers that are the sum of one or more consecutive squares in more than one way. A130052

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681