172198 has 16 divisors (see below), whose sum is σ = 287280. Its totient is φ = 76896.

The previous prime is 172181. The next prime is 172199. The reversal of 172198 is 891271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172199) 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 7 ways as a sum of consecutive naturals, for example, 873 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2¹⁷²¹⁹⁸ is an apocalyptic number.

172198 is a deficient number, since it is larger than the sum of its proper divisors (115082).

172198 is a wasteful number, since it uses less digits than its factorization.

172198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231.

The product of its digits is 1008, while the sum is 28.

The square root of 172198 is about 414.9674686045. The cubic root of 172198 is about 55.6343093454.

The spelling of 172198 in words is "one hundred seventy-two thousand, one hundred ninety-eight".