12420012 has 48 divisors (see below), whose sum is σ = 32481792. Its totient is φ = 3660480.

The previous prime is 12420011. The next prime is 12420017. The reversal of 12420012 is 21002421.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 12420012.

It is not an unprimeable number, because it can be changed into a prime (12420011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3613 + ... + 6155.

It is an arithmetic number, because the mean of its divisors is an integer number (676704).

Almost surely, 2^12420012 is an apocalyptic number.

12420012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12420012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16240896).

12420012 is an abundant number, since it is smaller than the sum of its proper divisors (20061780).

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

12420012 is a wasteful number, since it uses less digits than its factorization.

12420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12420012 is about 3524.2037398539. The cubic root of 12420012 is about 231.5833534648.

Adding to 12420012 its reverse (21002421), we get a palindrome (33422433).

It can be divided in two parts, 12 and 420012, that added together give a palindrome (420024).

The spelling of 12420012 in words is "twelve million, four hundred twenty thousand, twelve".