805072 has 20 divisors (see below), whose sum is σ = 1585216. Its totient is φ = 396000.

The previous prime is 805067. The next prime is 805073. The reversal of 805072 is 270508.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697 + ... + 1447.

2⁸⁰⁵⁰⁷² is an apocalyptic number.

It is an amenable number.

805072 is a deficient number, since it is larger than the sum of its proper divisors (780144).

805072 is a wasteful number, since it uses less digits than its factorization.

805072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 805072 is about 897.2580453805. The cubic root of 805072 is about 93.0275480113.

The spelling of 805072 in words is "eight hundred five thousand, seventy-two".