12503172 has 72 divisors (see below), whose sum is σ = 32771200. Its totient is φ = 3706560.

The previous prime is 12503167. The next prime is 12503201. The reversal of 12503172 is 27130521.

It is a super-3 number, since 3×12503172³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114654 + ... + 114762.

Almost surely, 2^12503172 is an apocalyptic number.

12503172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12503172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16385600).

12503172 is an abundant number, since it is smaller than the sum of its proper divisors (20268028).

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

12503172 is a wasteful number, since it uses less digits than its factorization.

12503172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12503172 is about 3535.9824660199. The cubic root of 12503172 is about 232.0990708467.

Adding to 12503172 its reverse (27130521), we get a palindrome (39633693).

The spelling of 12503172 in words is "twelve million, five hundred three thousand, one hundred seventy-two".