Properties of the Number 21341

Twenty-One Thousand Three Hundred Forty-One

Basics

Value: 21340 → 21341 → 21342

Parity: odd

Prime: Yes

Previous Prime: 21323

Next Prime: 21347

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 21341

Divisors: 1, 21341

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101011101

Octal: 51535

Duodecimal: 10425

Hexadecimal: 535d

Square: 455438281

Square Root: 146.08559134972896

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

Define an increasing sequence as follows. Given the first term called the seed (the seed need not have the property of the sequence.). Subsequent terms are defined as obtained by inserting/placing digits (at least one) in the previous term to obtain the smallest number with a given property. This is the growing prime sequence for the seed a(1) = 4. A68169

Primes whose decimal representation is a valid number in base 5 and interpreted as such is again a prime. A90708

Prime time primes on 6-digit clocks, second definition: primes of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295013

Numbers k such that the continued fraction for sqrt(k) has period 93. A20432

Numerator of ∑_{1<k<n, n mod k > 0} n/k. A79076

a(1) = 2 then primes in nondecreasing order such that every concatenation is prime. A89702

Right truncatable primes in base 9 (written in decimal form). A129693

Primes congruent to 52 mod 61. A142850

Primes p0 such that p0+p1+p2-+2 are primes; p0,p1,p2 are three consecutive primes. A158351

Number of binary strings of length n with equal numbers of 0000 and 0011 substrings. A164149