Properties of the Number -1565

Five Hundred Sixty-Five

Basics

Value: -1566 → -1565 → -1564

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 313

Divisors: 1, 5, 313, 1565

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11000011101

Octal: -3035

Duodecimal: -AA5

Hexadecimal: -61d

Square: 2449225

Square Root: 39.56008088970496

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

Coefficients T(n,k) of xⁿ*y^k in the function A(x,y) that satisfies: y = ∑_n=-oo..+oo x^2·n+1 * (1 - xⁿ)ⁿ⁺¹ * A(x,y)ⁿ, as a triangle read by rows with k = 0..n for each row index n >= 0. A357400

Expansion of f(x)³ * f(-x²) * χ(x³)³ in powers of·where χ(), f() are Ramanujan θ functions. A280384

G.f. A(x) satisfies: A(x) = 1 - ∑_k=1..5 (x·A(x))^k. A337514

Numbers m such that the Bernoulli number B_2·m has denominator 66. A51229

Second spoke of a hexagonal spiral. A56106

Number of partitions of n such that 2*(least part) = (number of parts). A237757

Numbers k such that k | 5^k + 5. A15891

Numbers where 5 outnumbers any other digit. A292455

Ordered hypotenuses of primitive Pythagorean triangles having legs that add up to a square. A88319

Number of integer compositions of n whose leaders of strictly increasing runs are themselves strictly increasing. A374688