Properties of the Number 61721

Sixty-One Thousand Seven Hundred Twenty-One

Basics

Value: 61720 → 61721 → 61722

Parity: odd

Prime: No

Previous Prime: 61717

Next Prime: 61723

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 11 × 31 × 181

Divisors: 1, 11, 31, 181, 341, 1991, 5611, 61721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111000100011001

Octal: 170431

Duodecimal: 2B875

Hexadecimal: f119

Square: 3809481841

Square Root: 248.43711477957555

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

Numbers k such that σ(k+1) = 2*σ(k). A67081

Numbers that cannot be expressed as sum of at most nine repdigits numbers. One may not add two integers with the same repeated digit. A339673

Integers m such that m³ is the sum of two or more consecutive integer squares. A212018

Strong pseudoprimes to base 46. A20272

Numbers n such that n³ can be represented as sum of (at least two) consecutive squares. A163390

Cubes that are the sum of two or more consecutive positive squares. A136312

Number of zeros in the character table of the dihedral group with 2n elements. A61721