123104205 has 80 divisors (see below), whose sum is σ = 254669184. Its totient is φ = 55728000.

The previous prime is 123104203. The next prime is 123104209. The reversal of 123104205 is 502401321.

It is not a de Polignac number, because 123104205 - 2¹ = 123104203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123104203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 490330 + ... + 490580.

Almost surely, 2^123104205 is an apocalyptic number.

123104205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123104205 is an abundant number, since it is smaller than the sum of its proper divisors (131564979).

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

123104205 is a wasteful number, since it uses less digits than its factorization.

123104205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 123104205 is about 11095.2334360301. The cubic root of 123104205 is about 497.4593857571.

Adding to 123104205 its reverse (502401321), we get a palindrome (625505526).

The spelling of 123104205 in words is "one hundred twenty-three million, one hundred four thousand, two hundred five".