123105604 has 6 divisors (see below), whose sum is σ = 215434814. Its totient is φ = 61552800.

The previous prime is 123105583. The next prime is 123105641. The reversal of 123105604 is 406501321.

It can be written as a sum of positive squares in only one way, i.e., 106131204 + 16974400 = 10302^2 + 4120^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15388197 + ... + 15388204.

Almost surely, 2^123105604 is an apocalyptic number.

It is an amenable number.

123105604 is a deficient number, since it is larger than the sum of its proper divisors (92329210).

123105604 is a wasteful number, since it uses less digits than its factorization.

123105604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30776405 (or 30776403 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 123105604 is about 11095.2964809418. The cubic root of 123105604 is about 497.4612701852.

Adding to 123105604 its reverse (406501321), we get a palindrome (529606925).

The spelling of 123105604 in words is "one hundred twenty-three million, one hundred five thousand, six hundred four".