172171105 has 16 divisors (see below), whose sum is σ = 212129280. Its totient is φ = 134085952.

The previous prime is 172171093. The next prime is 172171151. The reversal of 172171105 is 501171271.

It is a cyclic number.

It is not a de Polignac number, because 172171105 - 2¹¹ = 172169057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172171105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44436 + ... + 48154.

It is an arithmetic number, because the mean of its divisors is an integer number (13258080).

Almost surely, 2^172171105 is an apocalyptic number.

It is an amenable number.

172171105 is a deficient number, since it is larger than the sum of its proper divisors (39958175).

172171105 is a wasteful number, since it uses less digits than its factorization.

172171105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its (nonzero) digits is 490, while the sum is 25.

The square root of 172171105 is about 13121.3987440364. The cubic root of 172171105 is about 556.3141275224.

The spelling of 172171105 in words is "one hundred seventy-two million, one hundred seventy-one thousand, one hundred five".