Properties of the Number 61806

Sixty-One Thousand Eight Hundred Six

Basics

Value: 61805 → 61806 → 61807

Parity: even

Prime: No

Previous Prime: 61781

Next Prime: 61813

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 10301

Divisors: 1, 2, 3, 6, 10301, 20602, 30903, 61806

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000101101110

Octal: 170556

Duodecimal: 2B926

Hexadecimal: f16e

Square: 3819981636

Square Root: 248.6081253700289

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

Number of canonical 3-polytopes of size n. A319959

Square array of coefficients in the successive iterations of x·C(x) = (1-sqrt(1-4·x))/2 where C(x) is the g.f. of the Catalan numbers (A000108); read by antidiagonals. A158825

Triangle, read by rows, where the g.f. of row n divided by (1-x)ⁿ yields the g.f. of column n in the triangle A122888, for n>=1. A122890

Triangle, read by rows n>=1, where row n is the n-th differences of column n of array A158825, where the g.f. of row n of A158825 is the n-th iteration of x·Catalan(x). A158830

Numbers n such that the iterative cycle: n -> sum of digits of n² has only three distinct elements. A61806