Properties of the Number 39521

Thirty-Nine Thousand Five Hundred Twenty-One

Basics

Value: 39520 → 39521 → 39522

Parity: odd

Prime: Yes

Previous Prime: 39511

Next Prime: 39541

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 39521

Divisors: 1, 39521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101001100001

Octal: 115141

Duodecimal: 1AA55

Hexadecimal: 9a61

Square: 1561909441

Square Root: 198.79889335708083

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

Indices of prime NSW numbers A088165. A113501

Number of nonequivalent ways (mod D₃) to place rooks on an n X n X n triangular grid so that no two of them are on the same row, column or diagonal. A283117

Starts of runs of at least 3 consecutive odd numbers whose prime factors are all prime-indexed primes. A357168

Primes (with d digits, say) that generate another prime when acted on by the "standard" superpermutation of length A007489(d) of d elements (cf. comment). A244311

Centered 19-gonal (or nonadecagonal) primes. A264844

arcsinh(arcsin(arcsin(x)))=x+1/3!*x³+17/5!*x⁵+561/7!*x⁷+39521/9!*x⁹... A12069

a(n) = ∑_{i=0..floor(n/2)} T(2i,n-2i), array T as in A049735. A49738

Prime numbers p such that p - 1 is the fourth a-figurate number and nineteenth b-figurate number for some a and b. A144327

Smallest number of steps to reach prime(n) by applying the map x->A060308(x) starting from any member of A164368. A164917

Numbers whose base-12 representation has the same nonzero number of 2's and 10's. A39521