805172 has 12 divisors (see below), whose sum is σ = 1423716. Its totient is φ = 398400.

The previous prime is 805159. The next prime is 805177. The reversal of 805172 is 271508.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 106276 = 836^2 + 326^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805172.

It is not an unprimeable number, because it can be changed into a prime (805177) by changing a digit.

805172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (118643).

2⁸⁰⁵¹⁷² is an apocalyptic number.

It is an amenable number.

805172 is a deficient number, since it is larger than the sum of its proper divisors (618544).

805172 is a wasteful number, since it uses less digits than its factorization.

805172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 805172 is about 897.3137689794. The cubic root of 805172 is about 93.0313995797.

The spelling of 805172 in words is "eight hundred five thousand, one hundred seventy-two".