Properties of the Number -142

One Hundred Forty-Two

Basics

Value: -143 → -142 → -141

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 × 71

Divisors: 1, 2, 71, 142

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10001110

Octal: -216

Duodecimal: -BA

Hexadecimal: -8e

Square: 20164

Square Root: 11.916375287812984

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 q^-1/24 (m (1-m) / 16)^1/24 in powers of q, where m = k² is the parameter and q is the nome for Jacobian elliptic functions. A81360

Series expansion of the Ramanujan-Goellnitz-Gordon continued fraction. A92869

Expansion of ∏_{m >= 1} (1 + q^m)^-2. A22597

Image of primes (A000040) under "little Hankel" transform that sends [c₀, c₁, ...] to [d₀, d₁, ...] where d_n = c_n² - c_n+1*c_n-1. A56221

Unique attractor for (RIGHT then MOBIUS) transform. A7554

Table (read by rows) giving the coefficients of sum formulas of n-th Lucas numbers (A000204). The k-th row (k>=1) contains T(i,k) for i=1 to k, where k=[2·n+1+(-1)^n-1]/4 and T(i,k) satisfies L(n) = ∑_i=1..k T(i,k) * n^k-i / (k-1)!. A101032

Third column of the inverse of the triangle of polynomial coefficients P(0,x)=1, 2P(n,x)=(1+x)*[(1+x)^n-1+x^n-1]. A133135

Inverse Euler transform of {1, primes}. A30011

Convolution square of A255528. A278710

Expansion of ∏_k>=1 theta₄(x^k), where theta₄() is the Jacobi θ function. A320908