Properties of the Number 7941

Seven Thousand Nine Hundred Forty-One

Basics

Value: 7940 → 7941 → 7942

Parity: odd

Prime: No

Previous Prime: 7937

Next Prime: 7949

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 2647

Divisors: 1, 3, 2647, 7941

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111100000101

Octal: 17405

Duodecimal: 4719

Hexadecimal: 1f05

Square: 63059481

Square Root: 89.11228871485683

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

Square array A(n,k) by antidiagonals. A(n,k) is the number of length 2n k-ary words (n,k>=0), either empty or beginning with the first character of the alphabet, that can be built by repeatedly inserting doublets into the initially empty word. A183134

Number of compound perfect squared squares of order n up to symmetries of the square and its squared subrectangles. A181340

Number of nonempty subsets of {1..n} with mean n/2. A362046

G.f. satisfies x = A(x)*(1-A(x))/(1-A(x)-(A(x))²). A108623

Expansion of c(2·x²)/(1-x·c(2·x²)), where c(x) = (1-sqrt(1-4·x))/(2·x) is the g.f. of the Catalan numbers (A000108). A126087

Number of ternary words either empty or beginning with the first character of the alphabet, that can be built by inserting n doublets into the initially empty word. A194723

G.f. 1/(1-sum(n=1,N,x^n*(3·n-1/2))). A181324

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A298582

a(n) is the number of 4 element sets of distinct integer sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units. A389392

G.f. satisfies x = A(x)*(1+A(x))/(1-A(x)-(A(x))²). A108624