Properties of the Number 13566

Thirteen Thousand Five Hundred Sixty-Six

Basics

Value: 13565 → 13566 → 13567

Parity: even

Prime: No

Previous Prime: 13553

Next Prime: 13567

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 17 × 19

Divisors: 1, 2, 3, 6, 7, 14, 17, 19, 21, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11010011111110

Octal: 32376

Duodecimal: 7A26

Hexadecimal: 34fe

Square: 184036356

Square Root: 116.47317287684749

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

Stirling numbers of the first kind: s(n+2, n). A914

Self-convolution 4th power of A001764, which enumerates ternary trees. A6629

3 times 10-gonal (or decagonal) numbers: a(n) = 3·n*(4·n-3). A152767

Triangle read by rows: T(n,k) is the number of noncrossing trees with root degree equal to k. A92276

a(n) is the total number of pentagrams in a pentagram fractal after n iterations. A255870

T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences. A210355

Number of even parts in all partitions of n into distinct parts. A116680

Numbers k such that the central binomial coefficient C(2k,k) is divisible by k². A121943

a(n) = largest value of the function rad(m·n*(n - m)) n=2,3,4,..., 0 < m < n where the function rad(k) (also called radical(k)) is the product of distinct prime divisors of k. A147299

a(n+1) -+ a(n) = prime, a(n+1)*a(n) = average of twin prime pairs, a(1)=1, a(2)=6. A154494