Properties of the Number -7180

One Hundred Eighty

Basics

Value: -7181 → -7180 → -7179

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 359

Divisors: 1, 2, 4, 5, 10, 20, 359, 718, 1436, 1795

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110000001100

Octal: -16014

Duodecimal: -41A4

Hexadecimal: -1c0c

Square: 51552400

Square Root: 84.73488065725944

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*(9·n - 1)/2. A22266

Positive integers k such that k²⁰ + 1 is semiprime (A001358). A105282

Triangle T(n,k) of k-block ordered bicoverings of an unlabeled n-set, n >= 2, k = 3..n+floor(n/2). A60092

a(n) = floor(n·exp(-tan(n))). A134907

Generalized class numbers c_n,1. A233

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+359)² = y². A130610

a(n) = 250·n - 70. A154361

Number of partitions of n into parts with an odd number of distinct prime divisors. A285799

Triangle T(n,m,p,q) = (p^n-k*q^k + p^k*q^n-k)*(StirlingS1(n, k) + StirlingS1(n, n-k)) with p=2 and q=1, read by rows. A154913

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * ∑_j=0..n (-k)^n-j * (n-j)^j/j!. A351776