It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1065031 = 11 ⋅96821.
It is a Duffinian number.
21305601 is an apocalyptic number.
1305601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
1305601 is a wasteful number, since it uses less digits than its factorization.
1305601 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 118702.
The square root of 1305601 is about 1142.6289861543. The cubic root of 1305601 is about 109.2958045481.
The spelling of 1305601 in words is "one million, three hundred five thousand, six hundred one".