Properties of the Number 40821

Forty Thousand Eight Hundred Twenty-One

Basics

Value: 40820 → 40821 → 40822

Parity: odd

Prime: No

Previous Prime: 40819

Next Prime: 40823

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 × 1237

Divisors: 1, 3, 11, 33, 1237, 3711, 13607, 40821

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001111101110101

Octal: 117565

Duodecimal: 1B759

Hexadecimal: 9f75

Square: 1666354041

Square Root: 202.04207482601242

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

a(n) = ∑_i=1..n ∑_j=1..n (-1)^i+j * (i+j)!/(2!*i!*j!). A307349

Numerators of continued fraction convergents to sqrt(589). A42128

Partial sums of A334136. A332264

Number of 1's in n-th term of A007651. A22466

Self-convolution of n-th antidiagonal of the natural number array (so named in the Comments section of A000027). A387429

a(n) = (n+1)(n+2)(n+3)(35n³ + 153n² + 232n + 120)/720. A107971

Continued fraction for sqrt(851). A40821