Properties of the Number -825

Eight Hundred Twenty-Five

Basics

Value: -826 → -825 → -824

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 ² × 11

Divisors: 1, 3, 5, 11, 15, 25, 33, 55, 75, 165

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100111001

Octal: -1471

Duodecimal: -589

Hexadecimal: -339

Square: 680625

Square Root: 28.722813232690143

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

Coefficients T(n,k) of xⁿ*y^k in the function A(x,y) that satisfies: y = ∑_n=-oo..+oo x^2·n+1 * (1 - xⁿ)ⁿ⁺¹ * A(x,y)ⁿ, as a triangle read by rows with k = 0..n for each row index n >= 0. A357400

Dirichlet inverse of A064664, the inverse permutation of EKG-sequence. A323411

Triangle of coefficients, read by rows, where T(n,k) is the coefficient of xⁿ*y^k in f(x,y) that satisfies f(x,y) = (1+x) - x²*(1+x)³ + xy·f(x,y)³. A86634

Fourth column (m=3) of triangle A128494. A128498

Numerators of triangle S(n,k), n>=0, 0<=k<=ceiling((3n+1)/2): S(n,k) is the coefficient of x^k in polynomial s_n(x), used to define continuous and n times differentiable sigmoidal transfer functions. A144702

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of floor[(i+j)/2], as in A204164. A204165

Expansion of ∏_k>=1 (1-x^3·k)/(1-x^2·k). A262346

Expansion of e.g.f. -log(1 - x) * exp(-3·x). A346398

Expansion of ∏_m>=1 (1 - m·q^m)⁵. A22665

Triangle of diagonals of symmetric Krawtchouk matrices. A99037