Properties of the Number -405504

Four Hundred Five Thousand Five Hundred Four

Basics

Value: -405505 → -405504 → -405503

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: Yes

Factorization: 2 ¹² × 3 ² × 11

Divisors: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100011000000000000

Octal: -1430000

Duodecimal: -176800

Hexadecimal: -63000

Square: 164433494016

Square Root: 636.7919597482368

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

15-almost primes (generalization of semiprimes). A69276

G.f. satisfies: A(x) = exp( ∑_n>=1 [∑_k=0..2·n A200536(n,k)² * x^k] / A(x)ⁿ * xⁿ/n ), where A200536(n,k) is the coefficient of x^k in (1+3·x+2·x²)ⁿ. A200537

a(n) is the smallest palindrome > a(n-1) such that a(1)+a(2)+...+a(n) is a prime. A51934

Smallest palindrome with exactly n prime factors (counted with multiplicity). A76886

a(n) = A166231(n)/4ⁿ. A166232

Smallest natural number k such that periodic part of 1/k is n, or 0 if no such k exists. A37207

Expansion of (-1 + 1/(1-8·x)⁸)/(64·x); related to A053107. A53111

a(1) = 1; a(n) = smallest palindrome which is a nontrivial product of n palindromes (repetitions allowed). A71277

Smallest palindrome divisible by an n-th power. A82613

Smallest m such that m and reverse(m) each have n (not necessarily distinct) prime factors. A239697