12525215 has 4 divisors (see below), whose sum is σ = 15030264. Its totient is φ = 10020168.

The previous prime is 12525211. The next prime is 12525217. The reversal of 12525215 is 51252521.

12525215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12525215 - 2² = 12525211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252517 + ... + 1252526.

It is an arithmetic number, because the mean of its divisors is an integer number (3757566).

Almost surely, 2^12525215 is an apocalyptic number.

12525215 is a deficient number, since it is larger than the sum of its proper divisors (2505049).

12525215 is an equidigital number, since it uses as much as digits as its factorization.

12525215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505048.

The product of its digits is 1000, while the sum is 23.

The square root of 12525215 is about 3539.0980489385. The cubic root of 12525215 is about 232.2353870865.

Adding to 12525215 its reverse (51252521), we get a palindrome (63777736).

The spelling of 12525215 in words is "twelve million, five hundred twenty-five thousand, two hundred fifteen".