12503137 has 4 divisors (see below), whose sum is σ = 12906496. Its totient is φ = 12099780.

The previous prime is 12503131. The next prime is 12503149. The reversal of 12503137 is 73130521.

12503137 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73130521 = 61 ⋅1198861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12503137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12503131) 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, 201633 + ... + 201694.

It is an arithmetic number, because the mean of its divisors is an integer number (3226624).

Almost surely, 2^12503137 is an apocalyptic number.

It is an amenable number.

12503137 is a deficient number, since it is larger than the sum of its proper divisors (403359).

12503137 is an equidigital number, since it uses as much as digits as its factorization.

12503137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403358.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 12503137 is about 3535.9775168968. The cubic root of 12503137 is about 232.0988542757.

Adding to 12503137 its reverse (73130521), we get a palindrome (85633658).

The spelling of 12503137 in words is "twelve million, five hundred three thousand, one hundred thirty-seven".