Properties of the Number -142805

One Hundred Forty-Two Thousand Eight Hundred Five

Basics

Value: -142806 → -142805 → -142804

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 13 ⁴

Divisors: 1, 5, 13, 65, 169, 845, 2197, 10985, 28561, 142805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010110111010101

Octal: -426725

Duodecimal: -6A785

Hexadecimal: -22dd5

Square: 20393268025

Square Root: 377.89548819746443

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

Heinz numbers of integer partitions whose reciprocal sum is 1. A316855

T(n,k)=Rolling icosahedron footprints: number of nXk 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an icosahedral edge. A223233

Numbers of the form (5ⁱ)*(13^j). A107466

Numbers that are multiple-digit narcissistic numbers in exactly four bases. A256363

T(n,k)=Rolling icosahedron footprints: number of nXk 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal or vertical neighbor moves along an icosahedral edge. A223263

Triangle read by rows: T(i,j) is the number of i-permutations of 14 objects a,b,c,d,e,f,g,h,i,j,k,l,m,n, with repetition allowed, containing j a's. A133371

List of nonzero determinants of Unbordered Lights Out matrices UBL_k. A296353

a(n) = 5·n⁴. A269792

Triangle read by rows: T(n, k) = binomial(n+k, n-k)/(2·k + 1) * (2·n + 1)^k. A370262

Triangle of coefficients in expansion of (1+13x)ⁿ. A123187