12120500 has 48 divisors (see below), whose sum is σ = 30261504. Its totient is φ = 4154400.

The previous prime is 12120491. The next prime is 12120503. The reversal of 12120500 is 502121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120503) 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, 1769 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (630448).

Almost surely, 2^12120500 is an apocalyptic number.

12120500 is a gapful number since it is divisible by the number (10) 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 12120500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15130752).

12120500 is an abundant number, since it is smaller than the sum of its proper divisors (18141004).

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

12120500 is a wasteful number, since it uses less digits than its factorization.

12120500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3477 counting only the distinct ones).

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

The square root of 12120500 is about 3481.4508469889. The cubic root of 12120500 is about 229.7066202634.

Adding to 12120500 its reverse (502121), we get a palindrome (12622621).

The spelling of 12120500 in words is "twelve million, one hundred twenty thousand, five hundred".