Properties of the Number 42046

Forty-Two Thousand Forty-Six

Basics

Value: 42045 → 42046 → 42047

Parity: even

Prime: No

Previous Prime: 42043

Next Prime: 42061

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 21023

Divisors: 1, 2, 21023, 42046

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010000111110

Octal: 122076

Duodecimal: 203BA

Hexadecimal: a43e

Square: 1767866116

Square Root: 205.05121311516302

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 T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section. A286795

The least number s having exactly n fours in the continued fraction of sqrt(s). A206584

Expansion of (1 - 2·x - sqrt(1 - 4·x - 8·x²))/(6·x²). A122871

Numbers k such that A001414(k) is a square and sets a new record for squares. A64463

Numbers k such that the periodic part of the continued fraction of sqrt(k) has more ones than any smaller k. A206579

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 627", based on the 5-celled von Neumann neighborhood. A273276

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite CON = CIT-1 H2[B2Si54O112] starting with a T2 atom. A19095

a(n) = ∑_k=0..n 2^n-k * binomial(n,k) * binomial(3·n+1,k). A388130

Numerators of continued fraction convergents to sqrt(547). A42046

"1-ply" palindromic primes; see Comments. A208361