Properties of the Number -420420

Four Hundred Twenty Thousand Four Hundred Twenty

Basics

Value: -420421 → -420420 → -420419

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 7 ² × 11 × 13

Divisors: 1, 2, 3, 4, 5, 6, 7, 10, 11, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100110101001000100

Octal: -1465104

Duodecimal: -183370

Hexadecimal: -66a44

Square: 176752976400

Square Root: 648.398025906927

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: T(n, k) = (-1)^k+1*binomial(n,k)*binomial(n+k,k) (n >= k >= 0). A331430

T(n,k) = binomial(n,k)*binomial(n+k,k), 0 <= k <= n, triangle read by rows. A63007

Gaps associated with the arithmetic progressions of primes in A005115. A93364

Triangle read by rows: T(n,k) is the number of lattice paths from (0,0) to (n,n) using steps E=(1,0), N=(0,1) and D=(1,1) (i.e., bilateral Schroeder paths), having k D=(1,1) steps. A104684

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7. A252269

Areas of more than one primitive Pythagorean triangle. A24407

Numbers with exactly 6 distinct prime divisors {2,3,5,7,11,13}. A147573

Numbers k such that k-1, k+1, 2·k-1, 2·k+1, 3·k-1 and 3·k+1 are primes. A118859

Triangle of coefficients c(n,i), 1<=i<=n, such that for each n>=2, c(n,i) are setwise coprime; and for all primes p>2n-1, the sum of (-1)ⁱ*c(n,i)*binomial(i·p,p) is divisible by p^2n-1. A268512

a(n) = (5·n)!/((2·n)!*(2·n)!*n!). A1459