Properties of the Number 21407

Twenty-One Thousand Four Hundred Seven

Basics

Value: 21406 → 21407 → 21408

Parity: odd

Prime: Yes

Previous Prime: 21401

Next Prime: 21419

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 21407

Divisors: 1, 21407

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001110011111

Octal: 51637

Duodecimal: 1047B

Hexadecimal: 539f

Square: 458259649

Square Root: 146.31131193451859

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

Smallest balanced prime of order n. A82080

Primes that are the average of the members of emirp pairs. A178581

Primes p such that p-1 is squarefree and all prime divisors of p-1 other than 11 are also in the sequence. A267504

Primes of the form 7·x² - 5·y², where·and y are successive natural numbers. A176557

First of three consecutive primes whose concatenations, both forward and backward, are primes. A384953

Third term of weak prime sextet: p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2). A54830

Primes congruent to 49 mod 59. A142776

Prime numbers where the last digit is the sum of all the previous digits. A156617

Nonpalindromic primes that are the average of the members of emirp pairs. A178585

E.g.f.: exp(1 + x²/2 - exp(x)). A337062