Properties of the Number -1071

Seventy-One

Basics

Value: -1072 → -1071 → -1070

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 17

Divisors: 1, 3, 7, 9, 17, 21, 51, 63, 119, 153

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: -10000101111

Octal: -2057

Duodecimal: -753

Hexadecimal: -42f

Square: 1147041

Square Root: 32.72613634390714

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) = -3·a(n-1) + a(n-3), with a(0)=0, a(1)=6, and a(2)=-15. A215917

Expansion of ∑_k>0 x^3·k/(1+x^k)³. A363615

Expansion of 1/(1+x+x²-2·x³). A77975

Expansion of e.g.f. log(1+x) * sinh(x). A177699

Sequence is {a(5,n)}, where a(m,n) is defined at sequence A110665. A110670

Expansion of 1/(1 - x + x² + 2·x³). A77952

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 233", based on the 5-celled von Neumann neighborhood. A270979

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 329", based on the 5-celled von Neumann neighborhood. A271276

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood. A272283

The polygonal polynomials evaluated at x = -1/2 and normalized with (-2)ⁿ. A360605