12503205 has 96 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 5322240.

The previous prime is 12503201. The next prime is 12503209. The reversal of 12503205 is 50230521.

It is a happy number.

12503205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12503201) and next prime (12503209).

It is not a de Polignac number, because 12503205 - 2² = 12503201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503201) 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 95 ways as a sum of consecutive naturals, for example, 186582 + ... + 186648.

It is an arithmetic number, because the mean of its divisors is an integer number (278460).

Almost surely, 2^12503205 is an apocalyptic number.

12503205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12503205 is an abundant number, since it is smaller than the sum of its proper divisors (14228955).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12503205 is a wasteful number, since it uses less digits than its factorization.

12503205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 12503205 is about 3535.9871323295. The cubic root of 12503205 is about 232.0992750419.

Adding to 12503205 its reverse (50230521), we get a palindrome (62733726).

The spelling of 12503205 in words is "twelve million, five hundred three thousand, two hundred five".