Properties of the Number 38121

Thirty-Eight Thousand One Hundred Twenty-One

Basics

Value: 38120 → 38121 → 38122

Parity: odd

Prime: No

Previous Prime: 38119

Next Prime: 38149

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 97 × 131

Divisors: 1, 3, 97, 131, 291, 393, 12707, 38121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001010011101001

Octal: 112351

Duodecimal: 1A089

Hexadecimal: 94e9

Square: 1453210641

Square Root: 195.24599867859007

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

Odd composite integers m such that A006497(m) == 3 (mod m). A335669

a(n) is the smallest number k larger than a(n-1) such that n·d(k)*sopf(k)=σ(k), where d is the number of divisors (A000005) and sopf the sum of prime factors without repetition (A008472). A134382

Odd composite integers m such that U(m)² == 1 (mod m) and V(m) == 3 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=3 and b=-1, respectively. A337626

Numbers that are the concatenation of the digit-wise multiplication of k·m, with 1 < m < k, keeping the leading digits of k when m has fewer digits. A392040

Riordan array ((1-x²)/(1+3x+x²),x/(1+3x+x²)). A110168

Products p·q*r of three distinct primes such that (p·q) mod r, (p·r) mod q and (q·r) mod p are all prime. A338704

Triangle read by rows: characteristic polynomials of certain matrices, see Mathematica program. A124040

E.g.f.: (1 + 15·x + (45/2)*x² + (5/2)*x³)/(1 - 2·x)^13/2. A38121