12181025 has 12 divisors (see below), whose sum is σ = 15189504. Its totient is φ = 9690000.

The previous prime is 12180983. The next prime is 12181031. The reversal of 12181025 is 52018121.

It is a happy number.

It is not a de Polignac number, because 12181025 - 2²² = 7986721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12180988 and 12181006.

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 11 ways as a sum of consecutive naturals, for example, 3500 + ... + 6050.

It is an arithmetic number, because the mean of its divisors is an integer number (1265792).

Almost surely, 2^12181025 is an apocalyptic number.

It is an amenable number.

12181025 is a deficient number, since it is larger than the sum of its proper divisors (3008479).

12181025 is a wasteful number, since it uses less digits than its factorization.

12181025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12181025 is about 3490.1325189740. The cubic root of 12181025 is about 230.0883403563.

Adding to 12181025 its reverse (52018121), we get a palindrome (64199146).

The spelling of 12181025 in words is "twelve million, one hundred eighty-one thousand, twenty-five".