122198 has 4 divisors (see below), whose sum is σ = 183300. Its totient is φ = 61098.

The previous prime is 122173. The next prime is 122201. The reversal of 122198 is 891221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891221 = 307 ⋅2903.

It is a congruent number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 30548 + ... + 30551.

It is an arithmetic number, because the mean of its divisors is an integer number (45825).

2¹²²¹⁹⁸ is an apocalyptic number.

122198 is a deficient number, since it is larger than the sum of its proper divisors (61102).

122198 is an equidigital number, since it uses as much as digits as its factorization.

122198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61101.

The product of its digits is 288, while the sum is 23.

The square root of 122198 is about 349.5683051994. The cubic root of 122198 is about 49.6235731686.

Adding to 122198 its sum of digits (23), we get a palindrome (122221).

The spelling of 122198 in words is "one hundred twenty-two thousand, one hundred ninety-eight".