12210525 has 18 divisors (see below), whose sum is σ = 21870810. Its totient is φ = 6512160.

The previous prime is 12210503. The next prime is 12210563. The reversal of 12210525 is 52501221.

It can be written as a sum of positive squares in 3 ways, for example, as 2643876 + 9566649 = 1626^2 + 3093^2 .

It is not a de Polignac number, because 12210525 - 2⁶ = 12210461 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12210498 and 12210507.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 26910 + ... + 27359.

It is an arithmetic number, because the mean of its divisors is an integer number (1215045).

Almost surely, 2^12210525 is an apocalyptic number.

12210525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12210525 is a deficient number, since it is larger than the sum of its proper divisors (9660285).

12210525 is a wasteful number, since it uses less digits than its factorization.

12210525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54285 (or 54277 counting only the distinct ones).

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

The square root of 12210525 is about 3494.3561638734. The cubic root of 12210525 is about 230.2739332215.

Adding to 12210525 its reverse (52501221), we get a palindrome (64711746).

The spelling of 12210525 in words is "twelve million, two hundred ten thousand, five hundred twenty-five".