Properties of the Number 71287

Seventy-One Thousand Two Hundred Eighty-Seven

Basics

Value: 71286 → 71287 → 71288

Parity: odd

Prime: Yes

Previous Prime: 71263

Next Prime: 71293

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 71287

Divisors: 1, 71287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10001011001110111

Octal: 213167

Duodecimal: 35307

Hexadecimal: 11677

Square: 5081836369

Square Root: 266.996254655379

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

Primes of the form 6·k² + 1. A90687

Recurrence sequence derived from the decimal places of sqrt(e). A98327

Primes that remain prime through 4 iterations of function f(x) = 5·x + 6. A23315

Primes of the form 9n² - 2. A201860

Prime p such that sqrt(p+2) is semiprime (A001358). A257933

Primes of the form 11·k²-11·k+7. A267290

Number of nX3 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303309

a(n) is the least prime p such that the orderly concatenation of the n successive powers of p yields a prime number; a(n)=0 if n is a multiple of 6. A292163

Numerators of Peirce sequence of order 6. A71287

Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7. A252552