12215125 has 16 divisors (see below), whose sum is σ = 16419312. Its totient is φ = 9019200.

The previous prime is 12215123. The next prime is 12215131. The reversal of 12215125 is 52151221.

12215125 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3179089 + 9036036 = 1783^2 + 3006^2 .

It is not a de Polignac number, because 12215125 - 2¹ = 12215123 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215123) 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 15 ways as a sum of consecutive naturals, for example, 2134 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (1026207).

Almost surely, 2^12215125 is an apocalyptic number.

It is an amenable number.

12215125 is a deficient number, since it is larger than the sum of its proper divisors (4204187).

12215125 is an equidigital number, since it uses as much as digits as its factorization.

12215125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545 (or 7535 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 12215125 is about 3495.0143061224. The cubic root of 12215125 is about 230.3028461772.

Adding to 12215125 its reverse (52151221), we get a palindrome (64366346).

The spelling of 12215125 in words is "twelve million, two hundred fifteen thousand, one hundred twenty-five".