Properties of the Number 21475

Twenty-One Thousand Four Hundred Seventy-Five

Basics

Value: 21474 → 21475 → 21476

Parity: odd

Prime: No

Previous Prime: 21467

Next Prime: 21481

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 ² × 859

Divisors: 1, 5, 25, 859, 4295, 21475

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111100011

Octal: 51743

Duodecimal: 10517

Hexadecimal: 53e3

Square: 461175625

Square Root: 146.54350889752845

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 of 10 nonzero 8th powers. A3388

a(n) = (1+n)*(9 + 11·n + 4·n²)/3. A172482

Sums of terms of groups in A075621. A75625

The maximal norm of an additively indecomposable element in Shanks' simplest cubic field Q[x]/(x³ - n·x² - (n+3)*x - 1). A387575

Numbers n such that n is not an odd prime and not a square of prime and the n-th Motzkin number == 1 (mod n). A81736

Numbers k such that k² + 1 == 0 (mod 41²). A157116

Partial sums of A299898. A299899

Alternating sum of the numbers in the trajectory of n for the 3x+1 problem. A386437

Number of permutations of length n which avoid the patterns 1234, 2143, 3421. A116842

Numbers k such that (26·10^k - 131)/3 is prime. A272402