Properties of the Number -4221

Two Hundred Twenty-One

Basics

Value: -4222 → -4221 → -4220

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 67

Divisors: 1, 3, 7, 9, 21, 63, 67, 201, 469, 603

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000001111101

Octal: -10175

Duodecimal: -2539

Hexadecimal: -107d

Square: 17816841

Square Root: 64.96922348312314

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

Alternating sum of 12-gonal (or dodecagonal) numbers. A266088

Generalized 22-gonal (or icosidigonal) numbers: m*(10·m - 9) with m = 0, +1, -1, +2, -2, +3, -3, ... A303299

a(n) is the (n+1)st (n+2)-gonal number. A64808

a(n) = (2·n+5)*(2·n+1). A78371

First differences of the binomial transform of the distinct partition numbers (A000009). A129519

a(n) is smallest number such that number of primes produced according to rules stipulated in Honaker's A048853 is n. A50662

22-gonal numbers: a(n) = n*(10·n-9). A51874

Partial sums of round(n²/9). A177100

Expansion of ∏_m>=1 ((1+q^2·m-1)/(1+q^2·m))⁷. A29844

a(n) is the number of binary strings of length n such that no subsequence of length 4 contains 3 or more ones. A118647