Properties of the Number 71000

Seventy-One Thousand

Basics

Value: 70999 → 71000 → 71001

Parity: even

Prime: No

Previous Prime: 70999

Next Prime: 71011

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 5 ³ × 71

Divisors: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001010101011000

Octal: 212530

Duodecimal: 35108

Hexadecimal: 11558

Square: 5041000000

Square Root: 266.45825188948453

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

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the number of clockwise edge increases in every 2X2 subblock the same. A205255

Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a point symmetry but no line symmetry. A292155

Cubes written in base 9. A4639

a(n)=least k such that A284821(n) = A284761(k). A284822

a(n) = 5*(n+1)*(9·n+4). A304507

Numbers k such that k and k² use only the digits 0, 1, 4, 5 and 7. A136856

Number of right triangles on a (n+1)X9 grid. A189813

Number of (n+1) X 3 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock the same. A205249

Number of (n+1)X7 0..1 arrays with the number of clockwise edge increases in every 2X2 subblock the same. A205253

a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2·n - 3 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = a(2) = 1 and a(3) = 3. A49892