Properties of the Number 41809

Forty-One Thousand Eight Hundred Nine

Basics

Value: 41808 → 41809 → 41810

Parity: odd

Prime: Yes

Previous Prime: 41801

Next Prime: 41813

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 41809

Divisors: 1, 41809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010001101010001

Octal: 121521

Duodecimal: 20241

Hexadecimal: a351

Square: 1747992481

Square Root: 204.47249203743763

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

Primes for which the smallest positive primitive root is odd and nonprime. A70269

Primes with 21 as smallest positive primitive root. A61333

Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes). A362578

a(n) = 10·Fibonacci(n) + (-1)ⁿ. A372242

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0110 pattern in any orientation. A146919

Denominators of continued fraction convergents to sqrt(425). A41809

Number of nX3 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4. A197404

Table read by antidiagonals: T(b,n) is the number of n-step self avoiding walks on a 2D square grid confined inside an infinite well of width 2b where the walk starts at the middle of the well bottom. A336863

Table read by antidiagonals: T(b,n) is the number of n-step self avoiding walks on a 2D square grid confined inside a square box of dimension 2b X 2b where the walk starts at the middle of one of the box's edges. A336872