Properties of the Number 71505

Seventy-One Thousand Five Hundred Five

Basics

Value: 71504 → 71505 → 71506

Parity: odd

Prime: No

Previous Prime: 71503

Next Prime: 71527

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 7 × 227

Divisors: 1, 3, 5, 7, 9, 15, 21, 35, 45, 63

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001011101010001

Octal: 213521

Duodecimal: 35469

Hexadecimal: 11751

Square: 5112965025

Square Root: 267.4041884488723

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 every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A316953

A triangle of numbers related to triangle A049325. A49410

Triangular array read by rows: row n gives the coefficients of the polynomial p(n,x) defined in Comments. A249100

Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A316948

Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A316951

Sprague-Grundy values for octal game .13737. A71505