Properties of the Number -21486

Twenty-One Thousand Four Hundred Eighty-Six

Basics

Value: -21487 → -21486 → -21485

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 3581

Divisors: 1, 2, 3, 6, 3581, 7162, 10743, 21486

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001111101110

Octal: -51756

Duodecimal: -10526

Hexadecimal: -53ee

Square: 461648196

Square Root: 146.58103560829417

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

Sum over all partitions of n of the number of distinct parts i of multiplicity i. A276428

Initial members of abundant quadruplets, i.e., values of k such that (k, k+2, k+4, k+6) are all abundant numbers. A231089

Numbers m such that [A070080(m), A070081(m), A070082(m)] is a right integer triangle. A70136

Numbers k such that k⁴⁰⁹⁶ + (k+1)⁴⁰⁹⁶ is prime. A274236

Least k such that decimal representation of k·n contains only digits 0 and 6. A96685

Numbers whose anti-divisors sum to a perfect cube. A109351

Number of (n+1) X (1+1) 0..4 arrays with each row and column divisible by 13, read as a base-5 number with top and left being the most significant digits. A263434

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 565", based on the 5-celled von Neumann neighborhood. A272945