Properties of the Number 42644

Forty-Two Thousand Six Hundred Forty-Four

Basics

Value: 42643 → 42644 → 42645

Parity: even

Prime: No

Previous Prime: 42643

Next Prime: 42649

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 1523

Divisors: 1, 2, 4, 7, 14, 28, 1523, 3046, 6092, 10661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011010010100

Octal: 123224

Duodecimal: 20818

Hexadecimal: a694

Square: 1818510736

Square Root: 206.50423724466285

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 binary necklaces with n beads and at least three consecutive black beads. A351360

Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally. A228501

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically. A253698

Numerators of continued fraction convergents to sqrt(852). A42644