12215025 has 27 divisors (see below), whose sum is σ = 21972769. Its totient is φ = 6486720.

The previous prime is 12214999. The next prime is 12215033. The reversal of 12215025 is 52051221.

The square root of 12215025 is 3495.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 9809424 = 1551^2 + 3132^2 .

It is not a de Polignac number, because 12215025 - 2¹⁵ = 12182257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12214989 and 12215007.

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 26 ways as a sum of consecutive naturals, for example, 52309 + ... + 52541.

Almost surely, 2^12215025 is an apocalyptic number.

12215025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215025 is the 3495-th square number.

12215025 is the 1748-th centered octagonal number.

It is an amenable number.

12215025 is a deficient number, since it is larger than the sum of its proper divisors (9757744).

12215025 is an equidigital number, since it uses as much as digits as its factorization.

12215025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The cubic root of 12215025 is about 230.3022177118.

Adding to 12215025 its reverse (52051221), we get a palindrome (64266246).

The spelling of 12215025 in words is "twelve million, two hundred fifteen thousand, twenty-five".