Properties of the Number 1071

One Thousand Seventy-One

Basics

Value: 1070 → 1071 → 1072

Parity: odd

Prime: No

Previous Prime: 1069

Next Prime: 1087

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

Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

Numbers whose prime indices cannot be partitioned into constant blocks with distinct sums. A381636

Numbers that are the sum of 10 positive 5th powers. A3355

Multiples of 7 containing a 7 in their decimal representation. A121027

V-toothpick (or honeycomb) sequence (see Comments lines for definition). A161206

Numbers k such that φ(k) = φ(σ(k)). A6872

a(n) = n*(n+9)/2. A56000

Generalized 26-gonal (or icosihexagonal) numbers: m*(12·m - 11) with m = 0, +1, -1, +2, -2, +3, -3, ... A316724

Vertex number of a square spiral in which the length of the first two edges are the legs of the primitive Pythagorean triple [3, 4, 5]. The edges of the spiral have length A195019. A195020