12420420325 has 24 divisors (see below), whose sum is σ = 16140091968. Its totient is φ = 9463428480.

The previous prime is 12420420323. The next prime is 12420420347. The reversal of 12420420325 is 52302402421.

It is not a de Polignac number, because 12420420325 - 2¹ = 12420420323 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12420420325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420420323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87622 + ... + 180328.

It is an arithmetic number, because the mean of its divisors is an integer number (672503832).

Almost surely, 2^12420420325 is an apocalyptic number.

It is an amenable number.

12420420325 is a deficient number, since it is larger than the sum of its proper divisors (3719671643).

12420420325 is a wasteful number, since it uses less digits than its factorization.

12420420325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92973 (or 92968 counting only the distinct ones).

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

Adding to 12420420325 its reverse (52302402421), we get a palindrome (64722822746).

The spelling of 12420420325 in words is "twelve billion, four hundred twenty million, four hundred twenty thousand, three hundred twenty-five".