Properties of the Number -204120

Two Hundred Four Thousand One Hundred Twenty

Basics

Value: -204121 → -204120 → -204119

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ⁶ × 5 × 7

Divisors: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -110001110101011000

Octal: -616530

Duodecimal: -9A160

Hexadecimal: -31d58

Square: 41664974400

Square Root: 451.7964143284008

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

Triangle read by rows: terms T(n,k) of a binomial decomposition of n*(-1)ⁿ as Sum(k=0..n)T(n,k). A244141

Square of lower triangular matrix of A056857 (successive equalities in set partitions of n). A78937

Fourth column of PE². A129325

Denominators of expansion of -W_-1(-e^-1-x²/2) where W_-1 is Lambert W function. A5446

Number of 0..n arrays x(0..3) of 4 elements with each no smaller than the sum of its previous elements modulo (n+1). A200253

Number of (w,x,y,z) with all terms in {0,...,n} and w, x, and y even. A212759

Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>=3z. A212511

a(1) = 3, a(n) = smallest multiple of a(n-1) such that 10·a(n) + 1 is prime. A89325

Triangle read by rows: T(n,h)/(n-1), where T is the array in A101819. A101820

Triangle read by rows: T(n,m) (1<=m<=n) = number of surjections f:[n]->[m] with f(n) ≠ f(j), j<n. A380977