Properties of the Number 13620

Thirteen Thousand Six Hundred Twenty

Basics

Value: 13619 → 13620 → 13621

Parity: even

Prime: No

Previous Prime: 13619

Next Prime: 13627

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 227

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11010100110100

Octal: 32464

Duodecimal: 7A70

Hexadecimal: 3534

Square: 185504400

Square Root: 116.70475568716127

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

Values of the difference d for 6 primes in geometric-arithmetic progression with the minimal sequence {7·7^j + j·d}, j = 0 to 5. A209205

Maximal value of sum(p(i)p(i+1),i=1..n), where p(n+1)=p(1), as p ranges over all permutations of {1,2,...,n}. A110610

Number of ways to write n as an ordered sum of 10 nonzero tetrahedral numbers. A341809

Expansion of 1/(1-4·x+2·x³+x⁴). A195339

Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7. A333037

a(n) = n*(17·n + 1)/2. A22275

Numbers k such that 24·k-1 has at least three factors 7 and the partition function evaluated at k has at least the same number of factors 7 as 24·k-1. A340957

Binary encoding of balanced ordered rooted trees (counted by A007059). A358524

a(n) = 4·n*(n² + 2). A292022

Triangle read by rows: T(n,k) = ∑_j=k..n binomial(n,j)*Stirling₂(j,k)*Bell(n-j), where Bell(n) = A000110(n), for n >= 1, 0 <= k <= n-1. A244489