42240123424 has 12 divisors (see below), whose sum is σ = 83160243054. Its totient is φ = 21120061696.

The previous prime is 42240123403. The next prime is 42240123439. The reversal of 42240123424 is 42432104224.

It can be written as a sum of positive squares in only one way, i.e., 33379290000 + 8860833424 = 182700^2 + 94132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42240123392 and 42240123401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660001897 + ... + 660001960.

Almost surely, 2^42240123424 is an apocalyptic number.

It is an amenable number.

42240123424 is a deficient number, since it is larger than the sum of its proper divisors (40920119630).

42240123424 is a wasteful number, since it uses less digits than its factorization.

42240123424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320003867 (or 1320003859 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 42240123424 its reverse (42432104224), we get a palindrome (84672227648).

The spelling of 42240123424 in words is "forty-two billion, two hundred forty million, one hundred twenty-three thousand, four hundred twenty-four".