Properties of the Number 70686

Seventy Thousand Six Hundred Eighty-Six

Basics

Value: 70685 → 70686 → 70687

Parity: even

Prime: No

Previous Prime: 70667

Next Prime: 70687

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 7 × 11 × 17

Divisors: 1, 2, 3, 6, 7, 9, 11, 14, 17, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001010000011110

Octal: 212036

Duodecimal: 34AA6

Hexadecimal: 1141e

Square: 4996510596

Square Root: 265.8683884932543

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 n such that σ(n) = 12*φ(n). A104902

E.g.f. S(x,y) = Integral C(x,y)*C(y,x) dx such that C(x,y)² - S(x,y)² = 1 and C(y,x) = 1 + Integral S(y,x)*C(x,y) dy, where S(x,y) = ∑_n>=0 ∑_k=0..n T(n,k) * x^2·n+1-2·k*y^2·k/(2·n+1)!, as a triangle of coefficients T(n,k) read by rows. A322730

Numbers k such that both k and 2·k are balanced numbers (A020492). A76375

Triangle T(n,k) read by rows: number of labeled 2-regular digraphs (multiple arcs and loops allowed) on n nodes with k components. A307804

Numbers k such that k, 2·k and 4·k are balanced numbers (A020492). A76376

Numbers k for which the quotient q(k)=(k+rev(k))/abs(k-rev(k)) is an integer. A87993

Alexandrian integers: numbers of the form n = p·q*r such that 1/n = 1/p - 1/q - 1/r for some integers p,q,r. A147811

Triangle read by rows: Riordan array (1/(1-9x)^2/3, x/(9x-1)). A283151

a(n) = floor(n(n-1)(n-2)(n-3)/20). A11930

Numbers whose number of divisors equals the sum of their separate prime-power decompositions. A87004