Properties of the Number 21472

Twenty-One Thousand Four Hundred Seventy-Two

Basics

Value: 21471 → 21472 → 21473

Parity: even

Prime: No

Previous Prime: 21467

Next Prime: 21481

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁵ × 11 × 61

Divisors: 1, 2, 4, 8, 11, 16, 22, 32, 44, 61

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111100000

Octal: 51740

Duodecimal: 10514

Hexadecimal: 53e0

Square: 461046784

Square Root: 146.5332726721136

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

G.f. A(x,y) satisfies 1/x = ∑_n=-oo..+oo A(x,y)ⁿ * (A(x,y)ⁿ + y)ⁿ⁺¹, as a triangle of coefficients T(n,k) of xⁿ*y^k in A(x,y), read by rows. A379200

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..3 introduced in row major order. A231441

Row sums of the triangular array A246696. A246697

Sequence of which A078783 is the Recamán transform. A117073

Numbers that are nontrivially palindromic in three or more consecutive integer bases. A279093

Expansion of e.g.f. ∏_k>=1 ((1 + x^k)/(1 - x^k))^τ(k/k), where τ is A000005. A318977

Sums of squared terms in rows of triangle A112555. A112556

Number of rooted unlabeled bipartite cubic maps on a compact closed oriented surface with 2·n vertices (and thus 3·n edges), with a(0) = 1. A292187

Bessel function J₀(n) is a monotonically decreasing positive sequence. A46960

Unsigned row sums of triangle A114700. A116466