Properties of the Number 2421

Two Thousand Four Hundred Twenty-One

Basics

Value: 2420 → 2421 → 2422

Parity: odd

Prime: No

Previous Prime: 2417

Next Prime: 2423

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 269

Divisors: 1, 3, 9, 269, 807, 2421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100101110101

Octal: 4565

Duodecimal: 1499

Hexadecimal: 975

Square: 5861241

Square Root: 49.20365840057018

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

Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 25 (most significant digit on right). A29518

Number of partitions of partitions of n where all partitions have the same sum. A305551

(n+1)²*a(n+1) = (9n²+9n+3)*a(n) - 27·n²*a(n-1), with a(0) = 1 and a(1) = 3. A6077

Number of compositions (p₁, p₂, p₃, ...) of n with 1 <= p_i <= i for all i. A8930

Numbers k such that 3^k + 4 is prime. A58958

Irregular triangle read by rows where T(n,k) is the number of integer compositions of n with k excedances (parts above the diagonal), all zeros removed. A352524

a(n) = (3·n² + n + 2)/2. A104249

Concentric 22-gonal numbers. A195149

Number of bracelets (turnover necklaces) of n beads of 2 colors, 5 of them black. A32279

Number T(n,k) of Carlitz compositions of n with exactly k descents; triangle T(n,k), n>=0, 0<=k<=floor(n/3), read by rows. A241701