Properties of the Number 13721

Thirteen Thousand Seven Hundred Twenty-One

Basics

Value: 13720 → 13721 → 13722

Parity: odd

Prime: Yes

Previous Prime: 13711

Next Prime: 13723

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 13721

Divisors: 1, 13721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010110011001

Octal: 32631

Duodecimal: 7B35

Hexadecimal: 3599

Square: 188265841

Square Root: 117.13667231059623

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

Replace n with concatenation of its divisors. A37278

Primes which are the concatenation of two squares (in decimal notation). A167535

Primes such that the sum of the predecessor and successor primes is divisible by 43. A113158

Primes of form n² + 10000. A256838

T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order. A233098

Lesser of twin primes whose average is 6 times a prime. A60213

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..1 introduced in row major order. A204361

Primes p such that A001175(p) = (p-1)/4. A308789

Number of partitions of n having standard deviation σ > 2. A238661

Primes p = prime(k) such that prime(k) + prime(k+5) = prime(k+1) + prime(k+4) = prime(k+2) + prime(k+3). A64101