Properties of the Number 21602

Twenty-One Thousand Six Hundred Two

Basics

Value: 21601 → 21602 → 21603

Parity: even

Prime: No

Previous Prime: 21601

Next Prime: 21611

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 7 × 1543

Divisors: 1, 2, 7, 14, 1543, 3086, 10801, 21602

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010001100010

Octal: 52142

Duodecimal: 10602

Hexadecimal: 5462

Square: 466646404

Square Root: 146.97618854766918

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

Number of non-self-conjugate partitions of n. A330644

T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it, modulo 4. A239819

a(0) = 1, a(n) = 24·n² + 2 for n>0. A10014

Difference between successive primes cubed: a(n) = prime(n+1)³ - prime(n)³. A129701

a(n) = (1/4) * ∑_{k=0..floor(n/3)} (n-2·k+2) * 2^k * binomial(2·n-4·k+2,2·k+1). A391837

Numbers k such that k² contains only digits {0,4,6}, not ending with zero. A58437

a(n) = 49·n² - 7. A158484

Number of binary strings of length n with no substrings equal to 0000, 0010, or 0111. A164420

Perimeter (rounded down) of a tetraflake-like fractal after n iterations, a(1) = 1 (see comments). A235648

Triangle read by rows: Number of oriented graphs on n nodes with k components. A281446