4091904

Appears in sequences

• Smallest palindrome with exactly n prime factors (counted with multiplicity).at n=16A076886
• Smallest number m > 1 (not ending in a 0) such that m and the digit reversal of m have n prime factors (counted with multiplicity). Palindromes are included.at n=15A237913
• Smallest m such that m and reverse(m) each have n (not necessarily distinct) prime factors.at n=15A239697
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 606", based on the 5-celled von Neumann neighborhood.at n=21A289892
• Palindromes setting a new record of their number of prime divisors A001222.at n=12A348050
• Numbers k for which the repeating part with leading 0's of 1/k in decimal is a palindrome and longer than one digit.at n=17A382638