Properties of the Number 71021

Seventy-One Thousand Twenty-One

Basics

Value: 71020 → 71021 → 71022

Parity: odd

Prime: No

Previous Prime: 71011

Next Prime: 71023

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 29 × 31 × 79

Divisors: 1, 29, 31, 79, 899, 2291, 2449, 71021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010101101101

Octal: 212555

Duodecimal: 35125

Hexadecimal: 1156d

Square: 5043982441

Square Root: 266.49765477392106

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

E.g.f. satisfies A(x) = exp(x * (1 + x/A(x)²)). A365036

Triangle read by rows: T(n,k) is the number of directed column-convex polyominoes of area n and having k cells in the shortest column (1<=k<=n). A121301

Number of n X 2 0..1 arrays with each 1 adjacent to 2, 3 or 4 king-move neighboring 1s. A296821

Number of directed column-convex polyominoes having at least one 1-cell column. A121302

Square array T(i,j) = Bernoulli(2i)*Bernoulli(2j) read by antidiagonals: denominators. A71021