12051800 has 24 divisors (see below), whose sum is σ = 28020900. Its totient is φ = 4820640.

The previous prime is 12051779. The next prime is 12051811. The reversal of 12051800 is 815021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29930 + ... + 30329.

Almost surely, 2^12051800 is an apocalyptic number.

12051800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12051800 is an abundant number, since it is smaller than the sum of its proper divisors (15969100).

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

12051800 is a wasteful number, since it uses less digits than its factorization.

12051800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60275 (or 60266 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 12051800 is about 3471.5702499013. The cubic root of 12051800 is about 229.2717989615.

Adding to 12051800 its reverse (815021), we get a palindrome (12866821).

The spelling of 12051800 in words is "twelve million, fifty-one thousand, eight hundred".