Properties of the Number -242

Two Hundred Forty-Two

Basics

Value: -243 → -242 → -241

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: Yes

Factorization: 2 × 11 ²

Divisors: 1, 2, 11, 22, 121, 242

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110010

Octal: -362

Duodecimal: -182

Hexadecimal: -f2

Square: 58564

Square Root: 15.556349186104045

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

FP2 polynomials related to the generating functions of the left hand columns of the A156920 triangle. A156925

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∑_{d∣n, d==1 (mod 4)} d^k - ∑_{d∣n, d==3 (mod 4)} d^k. A322143

Expansion of q^-1/2 * (η(q) * η(q²))⁴ in powers of q. A30211

Expansion of 1/(2 - ∏_k>=1 (1 - x^k)). A307059

O.g.f.: exp( ∑_n>=1 -(σ(2·n²) - σ(n²)) * (-x)ⁿ/n ). A215603

a(n) = 1 - n⁵. A24003

Reversion of y - y² + y⁴. A63033

Sequence is {a(5,n)}, where a(m,n) is defined at sequence A111518. A111523

Expansion of 1/(1 +x -2·x² -x³ -x⁴ -3·x⁵ +2·x⁶ +2·x⁷ +3·x⁸ +2·x⁹ -3·x¹⁰ -7·x¹¹ -3·x¹² -5·x¹³). A143372

Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of g.f. ((1-x)^k-4)/((1-x)^k+x^k). A307394