Properties of the Number -3249

Two Hundred Forty-Nine

Basics

Value: -3250 → -3249 → -3248

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 ²

Divisors: 1, 3, 9, 19, 57, 171, 361, 1083, 3249

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010110001

Octal: -6261

Duodecimal: -1A69

Hexadecimal: -cb1

Square: 10556001

Square Root: 57

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

G.f. A(x) satisfies: A(x) = A(x² - x³)/x. A273218

Determinant of the n X n tridiagonal matrix M with the elements on the diagonals equal to 1, except M(n,n-1)=M(n-1,n)=n. A80322

Triangle read by rows: T(n,k) is the coefficient A_k in the transformation ∑_k=0..n x^k = ∑_k=0..n A_k*(x+2*(-1)^k)^k. A249266

Odd squares: a(n) = (2n+1)². Also centered octagonal numbers. A16754

Perfect powers of nonprimes (m^k where m is a nonprime positive integer and k >= 2). A131605

Squarefree numbers squared. A62503

a(n) = n*(n+1)²/2. A6002

Squares of the squarefree semiprimes (p²*q²). A85986

Numbers n such that n divides 2ⁿ + 1. A6521

a(n) = σ(n)². A72861