Properties of the Number 41820

Forty-One Thousand Eight Hundred Twenty

Basics

Value: 41819 → 41820 → 41821

Parity: even

Prime: No

Previous Prime: 41813

Next Prime: 41843

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 17 × 41

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 17

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010001101011100

Octal: 121534

Duodecimal: 20250

Hexadecimal: a35c

Square: 1748912400

Square Root: 204.49938875214272

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 n such that 54 'Reverse and Add' steps are needed to reach a palindrome. A65321

Expansion of (1 - x⁴ - x⁵)/((1 - x⁴ - x⁵)² - 4·x⁹). A376731

Primitive terms of A388036. A388037

Expansion of ∏_m>=1 (1+q^m)³⁰. A22594

a(n) = ∑_k=0..n binomial(n,k) * binomial(Fibonacci(k)+1,2). A33190

McKay-Thompson series of class 21A for Monster. A58563

Column k=10 of triangle A257673. A321955

Define the generalized Pisot sequence T(a(0),a(1)) by: a(n+2) is the greatest integer such that a(n+2)/a(n+1) < a(n+1)/a(n). This is T(3,5). A18917

Long leg of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse. A89548

a(n)= ∑_i=7..n+6 A000931(i). A167385