Properties of the Number 42042

Forty-Two Thousand Forty-Two

Basics

Value: 42041 → 42042 → 42043

Parity: even

Prime: No

Previous Prime: 42023

Next Prime: 42043

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 ² × 11 × 13

Divisors: 1, 2, 3, 6, 7, 11, 13, 14, 21, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010000111010

Octal: 122072

Duodecimal: 203B6

Hexadecimal: a43a

Square: 1767529764

Square Root: 205.04145922227534

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

Triangle read by rows: T(n,k) = C(n+k,n)*C(n,k)/(k+1), for n >= 0, k = 0..n. A88617

Triangle (0 <= k <= n) read by rows: T(n, k) is the number of Schröder paths from (0,0) to (2n,0) having k peaks. A60693

Triangular array of Motzkin polynomial coefficients. A55151

Non-palindromes in A110751; that is, non-palindromic numbers n such that n and R(n) have the same prime divisors, where R(n) = digit reversal of n. A110819

T(n,k)=Number of permutations of 0..floor((n·k-1)/2) on even squares of an nXk array such that each row and column of even squares is increasing. A215292

a(n) = (2n+4)!/(4!*n!*(n+1)!). A2803

Number of prime palindromes with n digits. A16115

T(n, k) = ∑_j=0..k (-1)^j*binomial(2·k, j)*(k - j)^2·n/(k!)², triangle read by rows, n >= 0 and 0 <= k <= n. A304336

Number triangle T(n,k) = binomial(n,k)*binomial(2n,n-k). A110608

a(n) = 42·binomial(n,10). A88626