Properties of the Number 16491

Sixteen Thousand Four Hundred Ninety-One

Basics

Value: 16490 → 16491 → 16492

Parity: odd

Prime: No

Previous Prime: 16487

Next Prime: 16493

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 × 239

Divisors: 1, 3, 23, 69, 239, 717, 5497, 16491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100000001101011

Octal: 40153

Duodecimal: 9663

Hexadecimal: 406b

Square: 271953081

Square Root: 128.4172885557081

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

Numbers k such that k!! + 2⁹ is prime. A76196

a(n) = T(n,n-5), array T as in A055801. A55805

Fibonacci sequence beginning 6, 13. A22388

a(n) = (2·n+1)*(7·n+1). A33572

a(n) = ∑_{k=0..floor(n/2)} binomial(4·n-k,n-2·k). A371743

a(n) = T(n, 2·n-5), T given by A027926. A27928

Odd 9-gonal (or enneagonal) numbers. A28991

Number of (w,x,y,z) with all terms in {1,...,n} and w + x > 2y + 2z. A212564

a(n) = (8·n³ + 3·n² + n) / 6. A219054

Number of idempotent 3X3 -n..n matrices of rank 2. A223452