Properties of the Number 19321

Nineteen Thousand Three Hundred Twenty-One

Basics

Value: 19320 → 19321 → 19322

Parity: odd

Prime: No

Previous Prime: 19319

Next Prime: 19333

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 139 ²

Divisors: 1, 139, 19321

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101101111001

Octal: 45571

Duodecimal: B221

Hexadecimal: 4b79

Square: 373301041

Square Root: 139

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

Squares of primes. A1248

a(n) = (6·n + 1)². A16922

Squares and cubes of primes. A168363

Numbers k such that k + 1 has one more divisor than k. A55927

Squares of primes lacking the digit zero in their decimal expansion. A52043

a(n) = (11·n + 7)². A17474

Numbers n such that ∑_d∣n τ(d) = ∏_d∣n τ(d). A280076

Position of first appearance of n in A380955 (sum of prime indices minus sum of distinct prime indices). A380956

Sorted positions of first appearances in A380955 (sum of prime indices minus sum of distinct prime indices). A380957

A Pellian-related recursive sequence. A54493