Properties of the Number 1841

One Thousand Eight Hundred Forty-One

Basics

Value: 1840 → 1841 → 1842

Parity: odd

Prime: No

Previous Prime: 1831

Next Prime: 1847

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 × 263

Divisors: 1, 7, 263, 1841

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100110001

Octal: 3461

Duodecimal: 1095

Hexadecimal: 731

Square: 3389281

Square Root: 42.906875905849866

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

Expansion of 1/((1-x)²*(1-x²)*(1-x³)). A601

a(n) = solution to the postage stamp problem with 3 denominations and n stamps. A1208

a(n) = (n + 3)² - 8. A28884

Toothpick sequence on hexagonal net. A182840

Number of distinct values taken by 7⁷^...⁷ (with n 7's and parentheses inserted in all possible ways). A145547

Ziggurat sequence (see Comments lines for definition). A347186

a(0)=1. a(n) = a(n-1)*2, if n is in the sequence. a(n) = a(n-1) + 1 if n is missing from the sequence. A118551

a(n) = nearest integer to n² * cos(sqrt(n)). A274090

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A302635

Odd numbers D not a square that admit proper solutions (x, y) to the Pell equation x² - D·y² = +8 with both·and y odd. A263012