12503320 has 16 divisors (see below), whose sum is σ = 28132560. Its totient is φ = 5001312.

The previous prime is 12503317. The next prime is 12503327. The reversal of 12503320 is 2330521.

12503320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12503320² = 312666022044800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12503294 and 12503303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156252 + ... + 156331.

It is an arithmetic number, because the mean of its divisors is an integer number (1758285).

Almost surely, 2^12503320 is an apocalyptic number.

12503320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12503320 is an abundant number, since it is smaller than the sum of its proper divisors (15629240).

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

12503320 is a wasteful number, since it uses less digits than its factorization.

12503320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312594 (or 312590 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 12503320 is about 3536.0033936635. The cubic root of 12503320 is about 232.0999866284.

Adding to 12503320 its reverse (2330521), we get a palindrome (14833841).

The spelling of 12503320 in words is "twelve million, five hundred three thousand, three hundred twenty".