122178 has 16 divisors (see below), whose sum is σ = 279360. Its totient is φ = 34896.

The previous prime is 122173. The next prime is 122201. The reversal of 122178 is 871221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122173) by changing a digit.

122178 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1413 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (17460).

2¹²²¹⁷⁸ is an apocalyptic number.

122178 is an abundant number, since it is smaller than the sum of its proper divisors (157182).

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

122178 is a wasteful number, since it uses less digits than its factorization.

122178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921.

The product of its digits is 224, while the sum is 21.

The square root of 122178 is about 349.5396973163. The cubic root of 122178 is about 49.6208657440.

Adding to 122178 its reverse (871221), we get a palindrome (993399).

It can be divided in two parts, 122 and 178, that added together give a triangular number (300 = T₂₄).

The spelling of 122178 in words is "one hundred twenty-two thousand, one hundred seventy-eight".