Properties of the Number -7139

One Hundred Thirty-Nine

Basics

Value: -7140 → -7139 → -7138

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 ² × 59

Divisors: 1, 11, 59, 121, 649, 7139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1101111100011

Octal: -15743

Duodecimal: -416B

Hexadecimal: -1be3

Square: 50965321

Square Root: 84.49260322655469

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

G.f.: ∏_i>=1 (1 - 2*(-x)ⁱ)/(1 - (-x)ⁱ)². A104510

a(n) = 4·n² - 6·n + 1. A125202

Fourth column (r=3) of FS(3) staircase array A062745. A62748

Odd composite integers m such that A006497(m-J(m,13)) == 2·J(m,13) (mod m), where J(m,13) is the Jacobi symbol. A339126

a(n) = 8·n² + 14·n + 5. A181890

a(n) is the number whose binary representation is the concatenation of the divisors of n written in base 2. A182622

Expansion of ∑_k>=1 ((1 + k·x^k)^k - 1). A327238

If p | n, then p+1 | n+1 for composite n. A56729

Numerator of sum of reciprocals of first n pentatope numbers A000332. A118411

a(n) = (1 + 3·n)*(4 + 3·n)/2. A145910