68587

Appears in sequences

• Pentagonal numbers (A000326) that are also brilliant numbers (A078972).at n=10A113941
• Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.at n=24A115703
• Smallest number m such that prime(n) is a factor of both m and sigma(m).at n=27A156099
• Semiprimes of the form n*(3*n-1)/2.at n=24A245365
• The first of three consecutive pentagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=3A298250
• Semiprimes of the form p(6p - 1).at n=14A330409
• Frobenius-Perron dimensions of simple integral fusion rings of rank 4.at n=4A369625