Properties of the Number 4081

Four Thousand Eighty-One

Basics

Value: 4080 → 4081 → 4082

Parity: odd

Prime: No

Previous Prime: 4079

Next Prime: 4091

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 11 × 53

Divisors: 1, 7, 11, 53, 77, 371, 583, 4081

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 111111110001

Octal: 7761

Duodecimal: 2441

Hexadecimal: ff1

Square: 16654561

Square Root: 63.88270501473775

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) = 8ⁿ - 2ⁿ + 1ⁿ. A155599

a(n) = ∑_k=0..n C(2k+2,k). A57552

Triangle read by rows: 3-Stirling numbers of the second kind. A143495

Number of ordered ways of writing n² as a sum of n squares of nonnegative integers. A298329

Number of integer partitions of n whose weighted sum is divisible by n. A362559

T(n,k) = Number of n X k array permutations with each element making a single king move. A189186

T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 nXk array. A218319

T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nXk array. A218372

Positions of 6 in A274640. A275191

Numbers k with exactly three distinct prime factors and such that cototient(k) is a square. A306670