Properties of the Number 42391

Forty-Two Thousand Three Hundred Ninety-One

Basics

Value: 42390 → 42391 → 42392

Parity: odd

Prime: Yes

Previous Prime: 42379

Next Prime: 42397

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 42391

Divisors: 1, 42391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010010110010111

Octal: 122627

Duodecimal: 20647

Hexadecimal: a597

Square: 1796996881

Square Root: 205.8907477280123

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

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern = [6, 6, 4]; short d-string notation of pattern = [664]. A78858

Smaller of 3 consecutive prime numbers such that p1·p2·p3+d1+d2-1=average of twin prime pairs, d1(δ)=p2-p1,d2(δ)=p3-p2. A153402

G.f.: (1 + x⁴ + x⁵ + x⁶ + x¹⁰ + x¹¹ + x¹² + x¹⁶)/∏_i=1..8 (1 - xⁱ). A256975

Primes p such that the differences between the 5 consecutive primes starting with p are (6,6,4,2). A78966

Numbers k such that 2^k + 2·k - 3 is prime. A392535

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite VNI = VPI-9 Rb44K4[Zn24Si96O240].48H2O starting with a T1 atom. A19252

Primes of the form 2·n³ + 4·n² + 4·n + 1. A195117

a(n) = (a(n-1) + n)/2^k where 2^k is the largest power of 2 dividing a(n-1) + n, for n>1 with a(1)=1. A208884

Denominators of continued fraction convergents to sqrt(722). A42391

Number of nX5 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..1 nX5 array. A218894