123421404 has 24 divisors (see below), whose sum is σ = 300504960. Its totient is φ = 39351664.

The previous prime is 123421399. The next prime is 123421421. The reversal of 123421404 is 404124321.

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, 223314 + ... + 223865.

It is an arithmetic number, because the mean of its divisors is an integer number (12521040).

Almost surely, 2^123421404 is an apocalyptic number.

It is an amenable number.

123421404 is an abundant number, since it is smaller than the sum of its proper divisors (177083556).

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

123421404 is a wasteful number, since it uses less digits than its factorization.

123421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447209 (or 447207 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 123421404 is about 11109.5186214345. The cubic root of 123421404 is about 497.8862823200.

Adding to 123421404 its reverse (404124321), we get a palindrome (527545725).

The spelling of 123421404 in words is "one hundred twenty-three million, four hundred twenty-one thousand, four hundred four".