123198 has 8 divisors (see below), whose sum is σ = 246408. Its totient is φ = 41064.

The previous prime is 123191. The next prime is 123203. The reversal of 123198 is 891321.

It is a sphenic number, since it is the product of 3 distinct primes.

123198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10261 + ... + 10272.

It is an arithmetic number, because the mean of its divisors is an integer number (30801).

2¹²³¹⁹⁸ is an apocalyptic number.

123198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123198 is a wasteful number, since it uses less digits than its factorization.

123198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20538.

The product of its digits is 432, while the sum is 24.

The square root of 123198 is about 350.9957264697. The cubic root of 123198 is about 49.7585694353.

The spelling of 123198 in words is "one hundred twenty-three thousand, one hundred ninety-eight".