Properties of the Number 12720

Twelve Thousand Seven Hundred Twenty

Basics

Value: 12719 → 12720 → 12721

Parity: even

Prime: No

Previous Prime: 12713

Next Prime: 12721

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ⁴ × 3 × 5 × 53

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11000110110000

Octal: 30660

Duodecimal: 7440

Hexadecimal: 31b0

Square: 161798400

Square Root: 112.78297743897348

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) = n³ + n² + n + 1. A53698

a(n) = 2·n*(4·n - 1). A14635

Numbers that can be expressed as the difference of the squares of primes in exactly four distinct ways. A92000

Triangle of Gaussian binomial coefficients [ n,k ] for q = 23. A22187

a(n) = (n⁴ + n² + 2·n)/4. A6528

Denominator of B_2n/(-4n), where B_m are the Bernoulli numbers. A6863

Sum of divisors of cubes. A175926

Triangle of coefficients of (1 - x)ⁿ*U(n,-(3·x - 2)/(2·x - 2)), where U(n,x) is the n-th Chebyshev polynomial of the second kind. A123027

Square array A(n, k) = σ(A246278(n, k)), read by falling antidiagonals. A355927

Triangle read by rows: T(n,m) (n >= m >= 1) = number of line segments formed by drawing the lines connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares. A331454