123420124 has 36 divisors (see below), whose sum is σ = 230087424. Its totient is φ = 57915648.

The previous prime is 123420071. The next prime is 123420137. The reversal of 123420124 is 421024321.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183052 + ... + 183724.

Almost surely, 2^123420124 is an apocalyptic number.

It is an amenable number.

123420124 is a deficient number, since it is larger than the sum of its proper divisors (106667300).

123420124 is a wasteful number, since it uses less digits than its factorization.

123420124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123420124 is about 11109.4610130285. The cubic root of 123420124 is about 497.8845611258.

Adding to 123420124 its reverse (421024321), we get a palindrome (544444445).

The spelling of 123420124 in words is "one hundred twenty-three million, four hundred twenty thousand, one hundred twenty-four".