Properties of the Number 71290

Seventy-One Thousand Two Hundred Ninety

Basics

Value: 71289 → 71290 → 71291

Parity: even

Prime: No

Previous Prime: 71287

Next Prime: 71293

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 7129

Divisors: 1, 2, 5, 10, 7129, 14258, 35645, 71290

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011001111010

Octal: 213172

Duodecimal: 3530A

Hexadecimal: 1167a

Square: 5082264100

Square Root: 267.00187265260894

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

T(n,k)=Number of nXk 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A281802

Both k and its reverse are one more than a square. A124664

Number of representations of 1 as a sum of numbers d·k with d in {-1,1} and k in {1,2,...,n}, where the sum of the numbers k is 2n + 1. A236430

Number of nX6 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A281800

Number of 4Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A281805

a(n) = T(2n,n-1), where T is the array defined in A026105. A26115

The sequence f(1), f(2), ... as defined in A067836. A71290