12105020 has 24 divisors (see below), whose sum is σ = 26916624. Its totient is φ = 4557056.

The previous prime is 12105019. The next prime is 12105029. The reversal of 12105020 is 2050121.

It is a junction number, because it is equal to n+sod(n) for n = 12104992 and 12105010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105029) 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 7 ways as a sum of consecutive naturals, for example, 17462 + ... + 18141.

It is an arithmetic number, because the mean of its divisors is an integer number (1121526).

Almost surely, 2^12105020 is an apocalyptic number.

12105020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12105020 is an abundant number, since it is smaller than the sum of its proper divisors (14811604).

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

12105020 is a wasteful number, since it uses less digits than its factorization.

12105020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35629 (or 35627 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 12105020 is about 3479.2269256259. The cubic root of 12105020 is about 229.6087867479.

Adding to 12105020 its reverse (2050121), we get a palindrome (14155141).

The spelling of 12105020 in words is "twelve million, one hundred five thousand, twenty".