Properties of the Number -142905

One Hundred Forty-Two Thousand Nine Hundred Five

Basics

Value: -142906 → -142905 → -142904

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 1361

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 1361, 4083

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100010111000111001

Octal: -427071

Duodecimal: -6A849

Hexadecimal: -22e39

Square: 20421839025

Square Root: 378.0277767572113

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(n) = 441·n² + 21. A158603

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 36. A31714

Number of ordered quadruples (i,j,k,l) in range [0..n] satisfying i == j (mod 2), j == k (mod 3) and k == l (mod 4). A115523

Triangular array T(n, k) read by rows: polynomials for the series expansion of the iterated function F^t(x) = ∑_n>=0 (1/x)^2·n-1*P_n(t)/n! with F¹(x) = (x + sqrt(x² + 4))/2 and F²(x) = F¹(F¹(x)). Row n of the triangle give the coefficients of the polynomial P_n(t). A390822