320120420425 has 48 divisors (see below), whose sum is σ = 450663155712. Its totient is φ = 223903123200.

The previous prime is 320120420407. The next prime is 320120420429. The reversal of 320120420425 is 524024021023.

It is not a de Polignac number, because 320120420425 - 2³¹ = 317972936777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 320120420425.

It is not an unprimeable number, because it can be changed into a prime (320120420429) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 135507 + ... + 811543.

It is an arithmetic number, because the mean of its divisors is an integer number (9388815744).

Almost surely, 2^320120420425 is an apocalyptic number.

It is an amenable number.

320120420425 is a deficient number, since it is larger than the sum of its proper divisors (130542735287).

320120420425 is a wasteful number, since it uses less digits than its factorization.

320120420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676138 (or 676133 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 320120420425 its reverse (524024021023), we get a palindrome (844144441448).

The spelling of 320120420425 in words is "three hundred twenty billion, one hundred twenty million, four hundred twenty thousand, four hundred twenty-five".