123243404 has 12 divisors (see below), whose sum is σ = 228362904. Its totient is φ = 57996864.

The previous prime is 123243313. The next prime is 123243409. The reversal of 123243404 is 404342321.

It is a self number, because there is not a number n which added to its sum of digits gives 123243404.

It is not an unprimeable number, because it can be changed into a prime (123243409) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 906134 + ... + 906269.

It is an arithmetic number, because the mean of its divisors is an integer number (19030242).

Almost surely, 2^123243404 is an apocalyptic number.

It is an amenable number.

123243404 is a deficient number, since it is larger than the sum of its proper divisors (105119500).

123243404 is a wasteful number, since it uses less digits than its factorization.

123243404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812424 (or 1812422 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 123243404 is about 11101.5045827131. The cubic root of 123243404 is about 497.6468144095.

Adding to 123243404 its reverse (404342321), we get a palindrome (527585725).

The spelling of 123243404 in words is "one hundred twenty-three million, two hundred forty-three thousand, four hundred four".