Properties of the Number 85785

Eighty-Five Thousand Seven Hundred Eighty-Five

Basics

Value: 85784 → 85785 → 85786

Parity: odd

Prime: No

Previous Prime: 85781

Next Prime: 85793

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 7 × 19 × 43

Divisors: 1, 3, 5, 7, 15, 19, 21, 35, 43, 57

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: 10100111100011001

Octal: 247431

Duodecimal: 41789

Hexadecimal: 14f19

Square: 7359066225

Square Root: 292.8907646205322

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

Split positive integers into extending even groups and sum: 1+2, 3+4+5+6, 7+8+9+10+11+12, 13+14+15+16+17+18+19+20, ... A61317

Start at (2n+1)/4 and iterate the map x -> x·ceiling(x); sequence gives number of steps for denominator to drop to 1 or 2; or -1 if this never happens. A85785