Properties of the Number 13445

Thirteen Thousand Four Hundred Forty-Five

Basics

Value: 13444 → 13445 → 13446

Parity: odd

Prime: No

Previous Prime: 13441

Next Prime: 13451

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 2689

Divisors: 1, 5, 2689, 13445

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010010000101

Octal: 32205

Duodecimal: 7945

Hexadecimal: 3485

Square: 180768025

Square Root: 115.95257651298655

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 maximal sum-free and product-free subsets of {1..n}. A326497

Positive integers of the form (6·m² + 1)/11. A179337

a(n) = Sum of all numbers of divisors of all numbers < (n+1)². A168011

a(n) = 8·n² - 3. A108928

Positive numbers y such that y² is of the form x²+(x+937)² with integer x. A160209

Moebius inversion of a sequence related to powers of 2. A178738

Coefficient of·in the reduction by x²->x+1 of the polynomial p(n,x) defined below in Comments. A192756

Odd numbers k such that φ(k) = φ(k+2), where φ is the Euler totient function (A000010). A333741

Numbers n such that 6n and 12n are both the average of twin prime pairs. A177680

E.g.f. A(x) satisfies A(x) = x * (1 + A(x)) * exp( A(x) * (1 + A(x)) ). A178920