123421432 has 8 divisors (see below), whose sum is σ = 231415200. Its totient is φ = 61710712.

The previous prime is 123421421. The next prime is 123421453. The reversal of 123421432 is 234124321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7713832 + ... + 7713847.

It is an arithmetic number, because the mean of its divisors is an integer number (28926900).

Almost surely, 2^123421432 is an apocalyptic number.

It is an amenable number.

123421432 is a deficient number, since it is larger than the sum of its proper divisors (107993768).

123421432 is a wasteful number, since it uses less digits than its factorization.

123421432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15427685 (or 15427681 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 123421432 is about 11109.5198816150. The cubic root of 123421432 is about 497.8863199710.

Adding to 123421432 its reverse (234124321), we get a palindrome (357545753).

The spelling of 123421432 in words is "one hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-two".