198106 has 4 divisors (see below), whose sum is σ = 297162. Its totient is φ = 99052.

The previous prime is 198097. The next prime is 198109. The reversal of 198106 is 601891.

198106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601891 = 271 ⋅2221.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 81 = 445^2 + 9^2 .

It is not an unprimeable number, because it can be changed into a prime (198109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49525 + ... + 49528.

2¹⁹⁸¹⁰⁶ is an apocalyptic number.

198106 is the 282-nd centered pentagonal number.

198106 is a deficient number, since it is larger than the sum of its proper divisors (99056).

198106 is an equidigital number, since it uses as much as digits as its factorization.

198106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99055.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 198106 is about 445.0910019311. The cubic root of 198106 is about 58.2951659623.

Adding to 198106 its reverse (601891), we get a palindrome (799997).

The spelling of 198106 in words is "one hundred ninety-eight thousand, one hundred six".