12390807042 has 12 divisors (see below), whose sum is σ = 26846748630. Its totient is φ = 4130269008.

The previous prime is 12390806999. The next prime is 12390807067. The reversal of 12390807042 is 24070809321.

It can be written as a sum of positive squares in only one way, i.e., 11261242161 + 1129564881 = 106119^2 + 33609^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12390806988 and 12390807006.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 344189067 + ... + 344189102.

Almost surely, 2^12390807042 is an apocalyptic number.

12390807042 is an abundant number, since it is smaller than the sum of its proper divisors (14455941588).

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

12390807042 is a wasteful number, since it uses less digits than its factorization.

12390807042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688378177 (or 688378174 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 12390807042 in words is "twelve billion, three hundred ninety million, eight hundred seven thousand, forty-two".