Properties of the Number 13660

Thirteen Thousand Six Hundred Sixty

Basics

Value: 13659 → 13660 → 13661

Parity: even

Prime: No

Previous Prime: 13649

Next Prime: 13669

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 683

Divisors: 1, 2, 4, 5, 10, 20, 683, 1366, 2732, 3415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010101011100

Octal: 32534

Duodecimal: 7AA4

Hexadecimal: 355c

Square: 186595600

Square Root: 116.87600266949585

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

Numbers k such that k² is palindromic in base 9. A29994

Number of partitions of n which can themselves be subdivided into two partitions whose sums differ by 1 at most. A276107

Ulam's spiral (SSE spoke). A143839

a(n) = (1/2) * ∑_{|k|<=2·sqrt(p)} k⁴*H(4·p-k²) where H() is the Hurwitz class number and p is n-th prime. A297491

Number of inequivalent ways to cut an n X n square into squares with integer sides, such that the dissection has 180-degree rotational symmetry, but no other symmetries. A240124

Row sums of A103691. A103692

Positive numbers k such that k and 4·k are anagrams in base 7 (written in base 7). A23070

Row sums of A103441. Number of two-colored bracelets of n beads with different sets of distances among the white beads. A103442

Numbers k such that 2^k+1 + 3^k is prime. A123924

Molien series for invariants of finite Coxeter group D₁₀ (bisected). A266773