Properties of the Number 26621

Twenty-Six Thousand Six Hundred Twenty-One

Basics

Value: 26620 → 26621 → 26622

Parity: odd

Prime: No

Previous Prime: 26597

Next Prime: 26627

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 7 × 3803

Divisors: 1, 7, 3803, 26621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110011111111101

Octal: 63775

Duodecimal: 134A5

Hexadecimal: 67fd

Square: 708677641

Square Root: 163.15943123215402

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 η(q³) * η(q³³) / ( η(q)* η(q¹¹)) in powers of q. A128663

Number of partitions of n that have odd sized Ferrers matrix. A238944

Numbers m that divide the alternating sum ∑_k=1..m (-1)^k+1 * sigma₂(k). A379922

a(n) = 2·a(n-1)+3 for n > 1, a(1) = 10. A156202

a(n) = n·2¹⁰ - 3. A362361

Odd numbers n such that the sum of the binary digits of n and n² both equal 12. A261593

1/16 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 30. A159229

a(n) = A026615(n, floor(n/2)). A26621

Number of (n+1)X4 binary arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace. A185744

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101. A259949