Properties of the Number -85491

Eighty-Five Thousand Four Hundred Ninety-One

Basics

Value: -85492 → -85491 → -85490

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 23 × 59

Divisors: 1, 3, 7, 9, 21, 23, 59, 63, 69, 161

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -10100110111110011

Octal: -246763

Duodecimal: -41583

Hexadecimal: -14df3

Square: 7308711081

Square Root: 292.38844026397487

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

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>1. A259746

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>0. A259745

Numbers n such that n and n+-1 have 4 distinct prime factors. A168628

Least number having n orderless representations as p² + q² + r², where p, q, and r are primes. A214512

Triangular numbers for which the sum of the digits equals the sum of the digits of the next triangular number. A117511

Triangular numbers for which the sum of the digits is a cube. A117803

Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001. A260244

Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001. A260247

Numbers k such that k and k+1 both have the prime signature (2,1,1,1) (A189982). A336658

Numbers that start a run of four consecutive triangular numbers with four distinct prime factors. A349773