122189 has 8 divisors (see below), whose sum is σ = 132000. Its totient is φ = 112752.

The previous prime is 122173. The next prime is 122201. The reversal of 122189 is 981221.

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

It is a cyclic number.

It is not a de Polignac number, because 122189 - 2⁴ = 122173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122149) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1067 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (16500).

2¹²²¹⁸⁹ is an apocalyptic number.

122189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

122189 is a deficient number, since it is larger than the sum of its proper divisors (9811).

122189 is a wasteful number, since it uses less digits than its factorization.

122189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187.

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

The square root of 122189 is about 349.5554319418. Note that the first 3 decimals coincide. The cubic root of 122189 is about 49.6223548641.

The spelling of 122189 in words is "one hundred twenty-two thousand, one hundred eighty-nine".