805321065 has 32 divisors (see below), whose sum is σ = 1299576960. Its totient is φ = 425836544.

The previous prime is 805321043. The next prime is 805321067. The reversal of 805321065 is 560123508.

It is a cyclic number.

It is not a de Polignac number, because 805321065 - 2⁶ = 805321001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (805321067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1221706 + ... + 1222364.

It is an arithmetic number, because the mean of its divisors is an integer number (40611780).

Almost surely, 2^805321065 is an apocalyptic number.

It is an amenable number.

805321065 is a deficient number, since it is larger than the sum of its proper divisors (494255895).

805321065 is a wasteful number, since it uses less digits than its factorization.

805321065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 805321065 is about 28378.1793813486. The cubic root of 805321065 is about 930.3714032817.

The spelling of 805321065 in words is "eight hundred five million, three hundred twenty-one thousand, sixty-five".