Properties of the Number 70856

Seventy Thousand Eight Hundred Fifty-Six

Basics

Value: 70855 → 70856 → 70857

Parity: even

Prime: No

Previous Prime: 70853

Next Prime: 70867

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 17 × 521

Divisors: 1, 2, 4, 8, 17, 34, 68, 136, 521, 1042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010011001000

Octal: 212310

Duodecimal: 35008

Hexadecimal: 114c8

Square: 5020572736

Square Root: 266.1879035568671

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

G.f.: ∑_k>=0 q(k)² * x^k / ∑_k>=0 q(k)*x^k, where q(n) is A000009(n). A304877

Continued fraction that converts to its own decimal expansion; the sequence becomes strictly increasing when all zero terms are removed. A391761

Triangle read by rows: T(n, k) = (-1)^{n - k} * binomial(2n + 1, n - k) * L(2k + 1), 0 <= k <= n, where L(k) is the k-th Lucas number (A000032). A326832

Indices n of Riemann ζ zeros where the Riemann-Siegel Z function sets successive records of maximum absolute values abs(Z(t)) in the interval between the n-th and (n+1)-th zeros. A329823

Numbers n such that σ(reverse(n)) = φ(n). A70856