805725 has 18 divisors (see below), whose sum is σ = 1443546. Its totient is φ = 429600.

The previous prime is 805723. The next prime is 805729. The reversal of 805725 is 527508.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 168921 + 636804 = 411^2 + 798^2 .

It is not a de Polignac number, because 805725 - 2¹ = 805723 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1566 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (80197).

2⁸⁰⁵⁷²⁵ is an apocalyptic number.

It is an amenable number.

805725 is a deficient number, since it is larger than the sum of its proper divisors (637821).

805725 is a wasteful number, since it uses less digits than its factorization.

805725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597 (or 3589 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 805725 is about 897.6218580226. The cubic root of 805725 is about 93.0526929971.

The spelling of 805725 in words is "eight hundred five thousand, seven hundred twenty-five".