12131800 has 24 divisors (see below), whose sum is σ = 28206900. Its totient is φ = 4852640.

The previous prime is 12131789. The next prime is 12131813. The reversal of 12131800 is 813121.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 30130 + ... + 30529.

Almost surely, 2^12131800 is an apocalyptic number.

12131800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131800 is an abundant number, since it is smaller than the sum of its proper divisors (16075100).

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

12131800 is a wasteful number, since it uses less digits than its factorization.

12131800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60675 (or 60666 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 12131800 is about 3483.0733555296. The cubic root of 12131800 is about 229.7779836167. Note that the first 3 decimals are identical.

Adding to 12131800 its reverse (813121), we get a palindrome (12944921).

The spelling of 12131800 in words is "twelve million, one hundred thirty-one thousand, eight hundred".