Properties of the Number 42018

Forty-Two Thousand Eighteen

Basics

Value: 42017 → 42018 → 42019

Parity: even

Prime: No

Previous Prime: 42017

Next Prime: 42019

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 47 × 149

Divisors: 1, 2, 3, 6, 47, 94, 141, 149, 282, 298

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010000100010

Octal: 122042

Duodecimal: 20396

Hexadecimal: a422

Square: 1765512324

Square Root: 204.98292611825016

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

Numbers on the square spiral board that are enclosed by four primes. A341542

Number of 321-avoiding permutations of length n whose squares also avoid the pattern 321. A326761

Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral. A172294

a(n) = (5·7ⁿ+1)/2. A199421

Averages q of twin prime pairs, such that q concatenated to q is also the average of a twin prime pair. A235109

a(n) is the smallest positive integer of length (distance from origin) n in the Cayley graph of the integers generated by all powers of 7. A297180

The excess of the number of partitions of n with more odd parts than even parts over the number of partitions of n with more even parts than odd parts. A338860

Numerators of continued fraction convergents to sqrt(533). A42018

Number of nX3 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4. A197404