Properties of the Number -1218

Two Hundred Eighteen

Basics

Value: -1219 → -1218 → -1217

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 29

Divisors: 1, 2, 3, 6, 7, 14, 21, 29, 42, 58

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -10011000010

Octal: -2302

Duodecimal: -856

Hexadecimal: -4c2

Square: 1483524

Square Root: 34.899856733230294

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

Partial sums of A128379. A128378

Triangle read by rows: row n gives coefficients C(n,j) for a Sheffer sequence (binomial-type) with lowering operator (D-1)/2 + T{ (1/2) * exp[(D-1)/2] } where T(x) is Cayley's Tree function. A135494

a(n) = A000730(7·n). A282941

G.f.: Im((2·i; x)_oo), where (a; q)_oo is the q-Pochhammer symbol, i = sqrt(-1). A292140

Partial sums of F(1) - L(1) + F(2) - L(2) + F(3) - L(3) + ..., where F = A000045 and L = A000032. A355018

Triangle, read by rows, T(n,k,m) = (m*(n-k)+1)*binomial(n-1, k-1) + (m·k+1)* binomial(n-1, k) - m·k*(n-k)*binomial(n-2, k-1), with m = 3. A157174

Triangle read by rows. The triangle algorithm applied to (-1)ⁿ/n!. A363732

a(n) = A023194 - A062700(n). Negative values of A071166(m) = m-A006530(A000203(m)) differences. In these cases m is square number from A023194. A71167

Triangle read by rows, inverse binomial transform of A152431. A152432

Expansion of e.g.f.: cos(tan(x)+log(x+1))=1-4/2!*x²+6/3!*x³-19/4!*x⁴+20/5!*x⁵... A12928