Properties of the Number 42550

Forty-Two Thousand Five Hundred Fifty

Basics

Value: 42549 → 42550 → 42551

Parity: even

Prime: No

Previous Prime: 42533

Next Prime: 42557

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 ² × 23 × 37

Divisors: 1, 2, 5, 10, 23, 25, 37, 46, 50, 74

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011000110110

Octal: 123066

Duodecimal: 2075A

Hexadecimal: a636

Square: 1810502500

Square Root: 206.27651344736267

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

Stirling numbers of the first kind: s(n+2, n). A914

Integers that are Rhonda numbers to base 15. A100974

Numbers k such that nearest common ancestor of k and σ(k) in Doudna tree (A347879) is the grandparent of k. A347392

Ordered Stirling numbers S1(n,k) >= 0. A193245

Numbers k such that the odd parts of σ(k) and A064989(k) are equal, where A064989 shifts the prime factorization one step towards lower primes, and σ is the sum of divisors function. A374463

Number of sets of 4 distinct collinear points in an n X n permutation array in which leftmost pair has same spacing as rightmost pair. A234471

G.f.: x*(1 - 2·x²)/(1 - x - 3·x² - 3·x³ - x⁴). A114723

Numerators of continued fraction convergents to sqrt(804). A42550

Number of (2+1)X(n+1) arrays of permutations of 0..n·3+2 with each element having directed index change 0,1 0,-1 0,2 1,0 or -1,0. A264258