Properties of the Number -1243

Two Hundred Forty-Three

Basics

Value: -1244 → -1243 → -1242

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 11 × 113

Divisors: 1, 11, 113, 1243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011011011

Octal: -2333

Duodecimal: -877

Hexadecimal: -4db

Square: 1545049

Square Root: 35.25620512760839

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

Expansion of (η(q) * η(q²) / (η(q⁵) * η(q¹⁰)))² in powers of q. A132041

Partial sums of A000594. A144248

McKay-Thompson series of class 10C for Monster. A58099

A (-1,1) Somos-4 sequence associated to the elliptic curve y² + x·y + y = x³ + x² + x. A178417

Expansion of 1 / (χ(x) * χ(x⁷)) in powers of·where χ() is a Ramanujan θ function. A246762

Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!*x²-3/3!*x³-15/4!*x⁴+41/5!*x⁵... A12222

A (1,1) Somos-4 sequence associated to the elliptic curve E: y² - x·y - y = x³ + x² + x. A178628

tanh(arcsin(tanh(x)))=x-3/3!*x³+41/5!*x⁵-1243/7!*x⁷+65681/9!*x⁹... A12129

sinh(arctan(tanh(x)))=x-3/3!*x³+41/5!*x⁵-1243/7!*x⁷+58001/9!*x⁹... A12225

A multiswitched integer differential-type sequence designed to be mostly odd: two types of integer differential sequences are switched in a way that is made odd: 1) a(n)=2·a(n-1)-a(n-2); 2) a(n)=3·a(n-1)-3·a(n-2)+a(n-3); the one back versions are 3) a(n)=2·a(n-2)-a(n-3); 4) a(n)=3·a(n-2)-3·a(n-3)+a(n-4). A137403