Properties of the Number -1749

Seven Hundred Forty-Nine

Basics

Value: -1750 → -1749 → -1748

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 53

Divisors: 1, 3, 11, 33, 53, 159, 583, 1749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11011010101

Octal: -3325

Duodecimal: -1019

Hexadecimal: -6d5

Square: 3059001

Square Root: 41.82104733265297

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) = 3·a(n-2) - a(n-3), with a(0)=0, a(1)=a(2)=-3. A215665

Minimal determinant of an n X n symmetric Toeplitz matrix using the integers 1 to n. A350953

a(n) = -a(n-2) - a(n-3). A112455

G.f. A(x) satisfies: A(x) = A(x³ - x⁵)/x². A350479

a(n) = -(n + 1)*(2·n² + n - 12)/6. A58372

First term of n-th difference sequence of (round(k·sqrt(6))), k >= 0. A325843

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A385014. A385018

Center antidiagonal four in a tri-antidiagonal n-th Matrix generated triangular sequence: first element as 4==m[1,1,1]. A124028

Generalized 9-gonal (or enneagonal) numbers: m*(7·m - 5)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A118277

Expansion of (3-2·x-3·x²)/(1-x-x²-x³). A141523