Properties of the Number 4518

Four Thousand Five Hundred Eighteen

Basics

Value: 4517 → 4518 → 4519

Parity: even

Prime: No

Previous Prime: 4517

Next Prime: 4519

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 251

Divisors: 1, 2, 3, 6, 9, 18, 251, 502, 753, 1506

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1000110100110

Octal: 10646

Duodecimal: 2746

Hexadecimal: 11a6

Square: 20412324

Square Root: 67.21606950722423

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

Multiples of 18 containing a 18 in their decimal representation. A121038

a(n) = n*(7·n - 1)/2. A22264

Numbers n such that n is both the average of some twin prime pair p, q (q = p+2) (i.e., n = p+1 = q-1) and is also the average of the prime before p and the prime after q. A256753

Sum T(n,k) of the entries in the k-th blocks of all set partitions of [n]; triangle T(n,k), n>=1, 1<=k<=n, read by rows. A285362

a(n) = n*(14·n - 1). A195024

Indices n of Fibonacci numbers Fib(n) (A000045) that are divisible by n-1 and n+1. A225219

Number of reversed integer partitions of n with all distinct trimmed 0-based partial alternating sums. A392704

Expansion of x/((1 - x - x⁴)*(1 - x)²). A145131

Number of polygons formed outside a regular n-gon when every pair of vertices of the n-gon are joined by an infinite line. A344311

Initial values for the iteration of the function f(x) = A063919(x) such that the iteration ends in a 5-cycle, i.e., in A097024. A97035