810172 has 12 divisors (see below), whose sum is σ = 1546776. Its totient is φ = 368240.

The previous prime is 810151. The next prime is 810191. The reversal of 810172 is 271018.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

810172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 9163 + ... + 9250.

It is an arithmetic number, because the mean of its divisors is an integer number (128898).

2⁸¹⁰¹⁷² is an apocalyptic number.

It is an amenable number.

810172 is a deficient number, since it is larger than the sum of its proper divisors (736604).

810172 is a wasteful number, since it uses less digits than its factorization.

810172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18428 (or 18426 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 810172 is about 900.0955504834. The cubic root of 810172 is about 93.2235727856.

The spelling of 810172 in words is "eight hundred ten thousand, one hundred seventy-two".