Properties of the Number 7081

Seven Thousand Eighty-One

Basics

Value: 7080 → 7081 → 7082

Parity: odd

Prime: No

Previous Prime: 7079

Next Prime: 7103

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 73 × 97

Divisors: 1, 73, 97, 7081

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101110101001

Octal: 15651

Duodecimal: 4121

Hexadecimal: 1ba9

Square: 50140561

Square Root: 84.1486779456457

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

Numbers that are the sum of 11 positive 8th powers. A3389

a(n) = 8·n² - 4·n + 1. A80856

Composite and every divisor (except 1) contains the digit 7. A62676

T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s. A297762

On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that a (1,n) leaper reaches before getting trapped, or -1 if it never gets trapped. A323471

a(n) = (3·n+1)*(4·n+1). A33577

Third row of Pascal-(1,5,1) array A081580. A81589

Quasi-Carmichael numbers to exactly two bases. A257752

Pseudoprimes to base 9. A20138

Numbers n such that the decimal number concat(6,n) is a square. A273361