12131225 has 12 divisors (see below), whose sum is σ = 15155280. Its totient is φ = 9632400.

The previous prime is 12131219. The next prime is 12131257. The reversal of 12131225 is 52213121.

It is a happy number.

12131225 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 12131225 - 2¹⁴ = 12114841 is a prime.

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, 1730 + ... + 5220.

It is an arithmetic number, because the mean of its divisors is an integer number (1262940).

Almost surely, 2^12131225 is an apocalyptic number.

It is an amenable number.

12131225 is a deficient number, since it is larger than the sum of its proper divisors (3024055).

12131225 is a wasteful number, since it uses less digits than its factorization.

12131225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640 (or 3635 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 12131225 is about 3482.9908125058. The cubic root of 12131225 is about 229.7743533659.

Adding to 12131225 its reverse (52213121), we get a palindrome (64344346).

The spelling of 12131225 in words is "twelve million, one hundred thirty-one thousand, two hundred twenty-five".