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Properties of the Number 16485

Sixteen Thousand Four Hundred Eighty-Five

Basics

Value: 16484 → 16485 → 16486

Parity: odd

Prime: No

Previous Prime: 16481

Next Prime: 16487

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 7 × 157

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 157, 471

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000001100101

Octal: 40145

Duodecimal: 9659

Hexadecimal: 4065

Square: 271755225

Square Root: 128.39392508993564

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) = n*(n + 1)*(3·n2 + 3·n - 2)/8. A236770
Wiener index of a benzenoid consisting of a zig-zag chain of n hexagons (s=13; see the Gutman et al. reference). A193393
Given the infinite continued fraction i+(i/(i+(i/(i+...)))), where i is the square root of (-1), this is the numerator of the real part of the convergents. A91806
a(n) = (n+3)*a(n-1) + a(n-2), with a(0)=0, a(1)=1. A58309
Numbers k such that k and 2·k, taken together are pandigital. A115922
Triangle T(n,k), read by rows, giving the numerator of the coefficient of xk in the Boros-Moll polynomial Pn(x) for n >= 0 and 0 <= k <=n. A223549
Triangle read by rows. Let S(k) be the sequence defined by F(0)=0, F(1)=1, F(n-1) + (n+k)*F(n) = F(n+1). E.g. S(0) = 0, 1, 1, 3, 10, 43, 225, 1393, 9976, 81201, ... Then S(0), S(1), S(2), ... are written vertically, next to each other, with the initial term of each on the next row down. A102472
Triangle read by rows. Let S(k) be the sequence defined by F(0)=0, F(1)=1, F(n-1) + (n+k)*F(n) = F(n+1). E.g. S(0) = 0,1,1,3,10,43,225,1393,9976,81201, ... Then S(0), S(1), S(2), ... are written next to each other, vertically, with the initial term of each on the next row down. The order of the terms in the rows are then reversed. A102473
Main diagonal of Unlucky array: a(n) = A255543(n,n). A255549
A213784/12. A213789