123138204 has 24 divisors (see below), whose sum is σ = 328368768. Its totient is φ = 35182320.

The previous prime is 123138179. The next prime is 123138233. The reversal of 123138204 is 402831321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732882 + ... + 733049.

It is an arithmetic number, because the mean of its divisors is an integer number (13682032).

Almost surely, 2^123138204 is an apocalyptic number.

123138204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123138204 is an abundant number, since it is smaller than the sum of its proper divisors (205230564).

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

123138204 is a wasteful number, since it uses less digits than its factorization.

123138204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465945 (or 1465943 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 123138204 is about 11096.7654746777. The cubic root of 123138204 is about 497.5051777615.

Adding to 123138204 its reverse (402831321), we get a palindrome (525969525).

The spelling of 123138204 in words is "one hundred twenty-three million, one hundred thirty-eight thousand, two hundred four".