Properties of the Number -21276

Twenty-One Thousand Two Hundred Seventy-Six

Basics

Value: -21277 → -21276 → -21275

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ³ × 197

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001100011100

Octal: -51434

Duodecimal: -10390

Hexadecimal: -531c

Square: 452668176

Square Root: 145.8629493737186

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

T(n,k)=Number of length n+6 0..k arrays with no seven consecutive terms having the maximum of any two terms equal to the minimum of the remaining five terms. A250059

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock. A236645

Sequence related to Kashaev's invariant for the (9,2)-torus knot. A208732

Convolution of A006068 (inverse of Gray code) with itself: a(n) = ∑_k=1..n+1 A006068(k) * A006068(1+n-k). A268721

a(n) = B(n+3) - 6·B(n+2) + 8·B(n+1)*B(n+1) - B(n), where the B(i) are Bell numbers (A000110). A225591

Numbers n such that σ(σ(n))/σ(n) > σ(σ(m))/σ(m) for all m < n. A289124

a(n) = (2·n³ + 5·n² - 17·n)/2. A162259

a(n) = 2·binomial(n+4, 4) + n + 4. A177206

Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock. A236641

Number of (n+1)X(4+1) 0..2 arrays colored with the maximum plus the upper median plus the lower median minus the minimum of every 2X2 subblock. A236644