Properties of the Number 7146

Seven Thousand One Hundred Forty-Six

Basics

Value: 7145 → 7146 → 7147

Parity: even

Prime: No

Previous Prime: 7129

Next Prime: 7151

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 397

Divisors: 1, 2, 3, 6, 9, 18, 397, 794, 1191, 2382

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111101010

Octal: 15752

Duodecimal: 4176

Hexadecimal: 1bea

Square: 51065316

Square Root: 84.53401682163222

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

Triangle T(n,k), 0 <= k <= n, read by rows given by: T(0,0)=1, T(n,k)=0 if k < 0 or if k > n, T(n,0) = T(n-1,1), T(n,k) = T(n-1,k-1) + 3·T(n-1,k) + T(n-1,k+1) for k >= 1. A126970

Number of generalized polyforms on the snub square tiling with n cells. A309159

G.f. A(x) = ∑_n=-oo..+oo xⁿ * (1 + xⁿ)^2·n. A260147

a(n) = n*(11·n+1)/2. A22269

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001. A260294

a(2·n+1) = 5·a(n), a(2·n+2) = 6·a(n) + a(n-1). A116553

Duplicate of A121370. A137908

Coordination sequence for root lattice B₃. A22145

Largest number k for which the n-th prime is the median of the largest prime dividing the first k integers. A126283

Coefficient of·in the reduction of the n-th 2nd-kind Chebyshev polynomial by x² -> x+1. A192236