1243275

Appears in sequences

• Starts of runs of 4 consecutive numbers that have an equal number of even and odd exponents in their prime factorization (A187039).at n=2A348078
• Starts of runs of 4 consecutive numbers that have an equal number of unitary and nonunitary prime divisors (A348097).at n=5A348100
• Numbers k such that k^2 is an odd primitive abundant number (A006038).at n=15A379950
• Numbers k such that k^2 is abundant but d*k is nonabundant for any proper divisor d of k.at n=24A381742