123404212 has 6 divisors (see below), whose sum is σ = 215957378. Its totient is φ = 61702104.

The previous prime is 123404201. The next prime is 123404231. The reversal of 123404212 is 212404321.

It can be written as a sum of positive squares in only one way, i.e., 115863696 + 7540516 = 10764^2 + 2746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123404212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15425523 + ... + 15425530.

Almost surely, 2^123404212 is an apocalyptic number.

It is an amenable number.

123404212 is a deficient number, since it is larger than the sum of its proper divisors (92553166).

123404212 is a wasteful number, since it uses less digits than its factorization.

123404212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30851057 (or 30851055 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123404212 is about 11108.7448435906. The cubic root of 123404212 is about 497.8631635358.

Adding to 123404212 its reverse (212404321), we get a palindrome (335808533).

The spelling of 123404212 in words is "one hundred twenty-three million, four hundred four thousand, two hundred twelve".