Properties of the Number 8645

Eight Thousand Six Hundred Forty-Five

Basics

Value: 8644 → 8645 → 8646

Parity: odd

Prime: No

Previous Prime: 8641

Next Prime: 8647

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 7 × 13 × 19

Divisors: 1, 5, 7, 13, 19, 35, 65, 91, 95, 133

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111000101

Octal: 20705

Duodecimal: 5005

Hexadecimal: 21c5

Square: 74736025

Square Root: 92.97849213662265

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

a(n) = (2·n+5)*(2·n+1). A78371

4-dimensional figurate numbers: a(n) = (6·n-2)*binomial(n+2,3)/4. A2419

Numbers k such that k and k+1 have 4 distinct prime factors. A140078

Squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p. A324315

a(n) = n*(n+1)*(n+2)*(n+7)/24. A5582

Dimensions of the irreducible representations of the simple Lie algebra of type E7 over the complex numbers, listed in increasing order. A121736

Numbers n whose square can be represented as a repdigit number in some base less than n. A158235

Sum of the sixth largest parts of the partitions of n into 9 parts. A326468

One-sixth the area of the smallest primitive d-arithmetic triangle, where d=A072330(n). A72360

a(n) = 8·n² + 14·n + 5. A181890