Properties of the Number -1321

Three Hundred Twenty-One

Basics

Value: -1322 → -1321 → -1320

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 1321

Divisors: 1, 1321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10100101001

Octal: -2451

Duodecimal: -921

Hexadecimal: -529

Square: 1745041

Square Root: 36.345563690772494

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

Primes or negative values of primes in the sequence b(n) = 47·n² - 1701·n + 10181, n >= 0. A50267

a(n) = A006496(n)/2. A45873

Coefficient of q²ⁿ in the series expansion of Ramanujan's mock θ function f(q). A39

Numerator of Bernoulli(n, 1/7). A158334

a(n) = 6·n³ - 263·n² + 3469·n - 12841. A218457

Expansion of exp( ∑_n>=1 -sigma₂(2·n)*xⁿ/n ) in powers of x. A283242

E.g.f. A(x) satisfies: A(x) = sin(x) + cos(x)*A(x)² with A(0)=1. A318599

List of primes produced by a certain "prime-generating" quartic polynomial. A96372

Triangle read by rows: coefficients of chromatic polynomials for the poset of Dyck paths ordered by inclusion. A141622

Expansion of ∏_k>=1 1/(1 + x^k)^k-1. A319109