Properties of the Number 4421

Four Thousand Four Hundred Twenty-One

Basics

Value: 4420 → 4421 → 4422

Parity: odd

Prime: Yes

Previous Prime: 4409

Next Prime: 4423

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 4421

Divisors: 1, 4421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1000101000101

Octal: 10505

Duodecimal: 2685

Hexadecimal: 1145

Square: 19545241

Square Root: 66.49060083951716

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Alternating factorials: n! - (n-1)! + (n-2)! - ... 1!. A5165

Primes of the form k² - k - 1. A2327

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

Number of partitions of n into aliquant parts (i.e., parts that do not divide n). A98743

Number of partitions of n in which the sequence of frequencies of the summands is nonincreasing. A100882

Least k such that (n^k-1)/(n-1) is prime, or 0 if no such prime exists. A84740

a(n) = 2·n² + 3. A93328

Primes such that the sum of the predecessor and successor primes is divisible by 23. A112847

a(n) = 4·n² - 6·n + 1. A125202

Primes having only {1, 2, 4} as digits. A260267