Properties of the Number 85781

Eighty-Five Thousand Seven Hundred Eighty-One

Basics

Value: 85780 → 85781 → 85782

Parity: odd

Prime: Yes

Previous Prime: 85751

Next Prime: 85793

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 85781

Divisors: 1, 85781

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10100111100010101

Octal: 247425

Duodecimal: 41785

Hexadecimal: 14f15

Square: 7358379961

Square Root: 292.8839360565888

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 that are the sum of the squares of three integers that form an arithmetic sequence with difference 7. A227994

Number of 4 X n 0..2 arrays with no element equal to the sum of elements to its left or one plus the sum of the elements above it, modulo 3. A239031

a(n) = 2·binomial(2·n+1,n+1) - 2ⁿ. A85781