12181925 has 24 divisors (see below), whose sum is σ = 17415552. Its totient is φ = 8280000.

The previous prime is 12181921. The next prime is 12181931. The reversal of 12181925 is 52918121.

It is not a de Polignac number, because 12181925 - 2² = 12181921 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181921) 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 23 ways as a sum of consecutive naturals, for example, 26195 + ... + 26655.

It is an arithmetic number, because the mean of its divisors is an integer number (725648).

Almost surely, 2^12181925 is an apocalyptic number.

It is an amenable number.

12181925 is a deficient number, since it is larger than the sum of its proper divisors (5233627).

12181925 is a wasteful number, since it uses less digits than its factorization.

12181925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 624 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 12181925 is about 3490.2614515248. The cubic root of 12181925 is about 230.0940069403.

The spelling of 12181925 in words is "twelve million, one hundred eighty-one thousand, nine hundred twenty-five".