Properties of the Number 12840

Twelve Thousand Eight Hundred Forty

Basics

Value: 12839 → 12840 → 12841

Parity: even

Prime: No

Previous Prime: 12829

Next Prime: 12841

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 107

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11001000101000

Octal: 31050

Duodecimal: 7520

Hexadecimal: 3228

Square: 164865600

Square Root: 113.31372379372236

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

Number of integer partitions of n whose mean is not an integer. A349156

a(n) = n*(8·n+1). A139275

Number of permutations of [n] with no 3-term arithmetic progression. A3407

Triangle of coefficients of Gandhi polynomials. A36970

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7. A252640

T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or antidiagonal neighbor (colorings ignoring permutations of colors). A208301

T(n,k) = Number of horizontal and antidiagonal neighbor colorings of the odd squares of an n X k array with new integer colors introduced in row major order. A216084

T(n,k) = Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X k array with new integer colors introduced in row major order. A216338

Number of connected components of n faces of the snub cube up to the 24 rotations of the snub cube. A384072

Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=10. A135195