Properties of the Number 21377

Twenty-One Thousand Three Hundred Seventy-Seven

Basics

Value: 21376 → 21377 → 21378

Parity: odd

Prime: Yes

Previous Prime: 21347

Next Prime: 21379

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 21377

Divisors: 1, 21377

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001110000001

Octal: 51601

Duodecimal: 10455

Hexadecimal: 5381

Square: 456976129

Square Root: 146.2087548678259

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

Least prime in A001359 (lesser of twin primes) such that the distance (A053319) to the next twin is 6·n. A52350

Addends k > 0 such that the polynomial x² + x + k produces a record of its Hardy-Littlewood Constant. A331940

Smallest prime that is obtained by placing digits on both sides of the n-th prime. Or smallest prime that encompasses the n-th prime. A75595

Primes of the form 128·k + 1. A208177

Primes which are the sum of three positive 4th powers. A85318

Prime numbers that are the sum of three distinct positive fourth powers. A126657

a(n) = A085956(3n+1). A86362

Primes p such that p·q-p-q and p·q+p+q are prime where q=nextprime(p). A128548

Coefficients in a q-analog of the function LambertW(-2x)/(-2x) at q=2. A152557

Primes of the form 384·k + 257. A229856