Properties of the Number 10721

Ten Thousand Seven Hundred Twenty-One

Basics

Value: 10720 → 10721 → 10722

Parity: odd

Prime: No

Previous Prime: 10711

Next Prime: 10723

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 71 × 151

Divisors: 1, 71, 151, 10721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100111100001

Octal: 24741

Duodecimal: 6255

Hexadecimal: 29e1

Square: 114939841

Square Root: 103.54226190305097

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(0) = 0 and a(n) = (4·n³ - 12·n² + 20·n - 9)/3 for n >= 1. A174794

Number of ascent sequences avoiding the pattern 100. A202059

Numbers n such that Q(sqrt(n)) has class number 9. A218041

Fundamental discriminants of real quadratic number fields with class number 9. A218159

Triangle, read by rows, where T(n,k) is defined for n>=1, k=1..2·n-1, by a formula analogous to the second-order Eulerian triangle A008517. A219120

Nonprimes such that it takes exactly 4 iterations of reverse-and-add digits to generate a prime. A245209

Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2·permanent. A280343

Numbers n such that σ(n) - φ(n) is a repdigit greater than 2. A116020

Partial sums of A304076. A304078

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 0, -1), (0, 1, -1), (1, 0, 0)}. A148286