52647

Appears in sequences

• Concatenating n with n+1 (in base 10) gives a number which is the product of 2 palindromes.at n=29A113942
• Numbers that end with decimal digit 1, 3, 7, or 9 and that produce only composite numbers when any of the digits 0,1,...,9 is inserted anywhere in them (including at the beginning or end).at n=1A125268