Properties of the Number -6426

Four Hundred Twenty-Six

Basics

Value: -6427 → -6426 → -6425

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 7 × 17

Divisors: 1, 2, 3, 6, 7, 9, 14, 17, 18, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

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Representations

Binary: -1100100011010

Octal: -14432

Duodecimal: -3876

Hexadecimal: -191a

Square: 41293476

Square Root: 80.16233529532433

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 triangle of polynomial coefficients:{a, b, c, d} = {2, 3, 3, 2}; p(x,n)=(-1)ⁿ*(1 - d - c x)^{n + 1}*Sum[(a·k + b)ⁿ*(c·x + d)^k, {k, 0, Infinity}]. A154593

Number of integer partitions of n with (1) as many odd parts as odd conjugate parts and (2) as many even parts as even conjugate parts. A351976

Numbers of the form p³*q·r*s where p, q, r, and s are distinct primes. A179670

Numbers k such that σ(k) = ψ(k) + φ(k). A389478

a(n) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1 and a(2) = a(3) = 2. A50047

a(n) = (2·n + 1)*(5·n + 1). A33571

Number of compositions of n with unique smallest part. A105039

Sum of the largest parts in the partitions of n into 8 parts. A308998

Relative of Hofstadter Q-sequence: a(n) = max(0, n+3201) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A373236

Expansion of (∏_j>=1 (1-(-x)^j) - 1)⁹ in powers of x. A1487