123042428 has 18 divisors (see below), whose sum is σ = 220177776. Its totient is φ = 60137824.

The previous prime is 123042397. The next prime is 123042443. The reversal of 123042428 is 824240321.

It is a junction number, because it is equal to n+sod(n) for n = 123042397 and 123042406.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 151688 + ... + 152496.

Almost surely, 2^123042428 is an apocalyptic number.

It is an amenable number.

123042428 is a deficient number, since it is larger than the sum of its proper divisors (97135348).

123042428 is an frugal number, since it uses more digits than its factorization.

123042428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 123042428 is about 11092.4491434489. The cubic root of 123042428 is about 497.3761590021.

Adding to 123042428 its reverse (824240321), we get a palindrome (947282749).

The spelling of 123042428 in words is "one hundred twenty-three million, forty-two thousand, four hundred twenty-eight".