12420079825 has 12 divisors (see below), whose sum is σ = 15402287628. Its totient is φ = 9935168000.

The previous prime is 12420079817. The next prime is 12420079831. The reversal of 12420079825 is 52897002421.

It can be written as a sum of positive squares in 6 ways, for example, as 5942405569 + 6477674256 = 77087^2 + 80484^2 .

It is not a de Polignac number, because 12420079825 - 2³ = 12420079817 is a prime.

It is a Duffinian 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, 492729 + ... + 517321.

It is an arithmetic number, because the mean of its divisors is an integer number (1283523969).

Almost surely, 2^12420079825 is an apocalyptic number.

It is an amenable number.

12420079825 is a deficient number, since it is larger than the sum of its proper divisors (2982207803).

12420079825 is a wasteful number, since it uses less digits than its factorization.

12420079825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44804 (or 44799 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 12420079825 in words is "twelve billion, four hundred twenty million, seventy-nine thousand, eight hundred twenty-five".