Properties of the Number 81421

Eighty-One Thousand Four Hundred Twenty-One

Basics

Value: 81420 → 81421 → 81422

Parity: odd

Prime: Yes

Previous Prime: 81409

Next Prime: 81439

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 81421

Divisors: 1, 81421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111000001101

Octal: 237015

Duodecimal: 3B151

Hexadecimal: 13e0d

Square: 6629379241

Square Root: 285.34365246137855

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

Primes p such that p, p+18, p+36 are consecutive primes. A52189

E.g.f. satisfies A(x) = exp(x * (1 + x·A(x)³)). A363354

Primes of the form ∑_k=1..m (m^k mod (m+k)). A156557

a(n) is the start of the first occurrence of exactly n consecutive zeroless primes (A038618). A384793

a(n) = (3^2·n + 5^2·n) / 2. A81421