Properties of the Number -6545

Five Hundred Forty-Five

Basics

Value: -6546 → -6545 → -6544

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 7 × 11 × 17

Divisors: 1, 5, 7, 11, 17, 35, 55, 77, 85, 119

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: Yes

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Representations

Binary: -1100110010001

Octal: -14621

Duodecimal: -3955

Hexadecimal: -1991

Square: 42837025

Square Root: 80.90117428072351

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) = p(n)/(p(k)*p(n-k)), where p(n) = ∏_j=1..n A001607(j). A177693

Tetrahedral (or triangular pyramidal) numbers: a(n) = C(n+2,3) = n*(n+1)*(n+2)/6. A292

a(n) = 1² + 3² + 5² + 7² + ... + (2·n-1)² = n*(4·n² - 1)/3. A447

Spt function: total number of smallest parts (counted with multiplicity) in all partitions of n. A92269

Number of parts > 1 in the last section of the set of partitions of n. A138135

Composite numbers such that the square root of the sum of squares of their prime factors (with multiplicity) is an integer. A134605

Squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p. A324315

Smallest order of cyclotomic polynomial containing n or -n as a coefficient. A13594

T(n,k)=Number of length n+5 0..k arrays with some disjoint triples in each consecutive six terms having the same sum. A248068

Smallest Rhonda number to base b = n-th composite number, A002808(n). A255872