Properties of the Number -170

One Hundred Seventy

Basics

Value: -171 → -170 → -169

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 17

Divisors: 1, 2, 5, 10, 17, 34, 85, 170

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10101010

Octal: -252

Duodecimal: -122

Hexadecimal: -aa

Square: 28900

Square Root: 13.038404810405298

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) = (n+1)*(2-n)/2. A80956

G.f.: (1+x)/(1+x-2·x²). A151575

Recurrence a(n+2) = ∑_k=0..n binomial(n,k)*a(k)*a(n+1-k) with a(0)=1, a(1)=-2. A289068

Partial alternating sums of the Dedekind ψ function (A001615): a(n) = ∑_k=1..n (-1)^k+1 * ψ(k). A357817

Expansion of χ(-q) / χ(-q⁷) in powers of q where χ() is a Ramanujan θ function. A113297

Dirichlet inverse of sigma₂ function (A001157). A53822

a(n) = 6ⁿ(B_n(1/6)-B_n(0)) where B_n(x) is the n-th Bernoulli polynomial. A83010

Expansion of g.f. 1+x+(1+3·x+x²)/(1+x)³. A201163

Expansion of (1-x)/(1-x+2·x²). A78020

Coefficient array for certain polynomials N(5; k,x) (rising powers in x). A62986