Properties of the Number 27021

Twenty-Seven Thousand Twenty-One

Basics

Value: 27020 → 27021 → 27022

Parity: odd

Prime: No

Previous Prime: 27017

Next Prime: 27031

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 9007

Divisors: 1, 3, 9007, 27021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100110001101

Octal: 64615

Duodecimal: 13779

Hexadecimal: 698d

Square: 730134441

Square Root: 164.38065579623412

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) = (4·n³ - 9·n² + 11·n + 3)/3. A161707

Odd numbers k such that φ(k) and cototient(k) have the same prime signature. A280927

Number of compositions of n where the difference between largest and smallest parts equals four. A323121

Partial sums of A011863. A11888

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, -1), (1, -1, 1), (1, 0, 0)}. A148253

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}. A150361

a(n) = T(n,n) + T(n,m+1) + ... + T(n,n), where m=[ (n+2)/2 ], T given by A027011. A27021