12503457 has 32 divisors (see below), whose sum is σ = 19353600. Its totient is φ = 7971984.

The previous prime is 12503441. The next prime is 12503461. The reversal of 12503457 is 75430521.

It is a happy number.

12503457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12503457 - 2⁴ = 12503441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12503457.

It is not an unprimeable number, because it can be changed into a prime (12503417) 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 31 ways as a sum of consecutive naturals, for example, 74788 + ... + 74954.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^12503457 is an apocalyptic number.

It is an amenable number.

12503457 is a deficient number, since it is larger than the sum of its proper divisors (6850143).

12503457 is a wasteful number, since it uses less digits than its factorization.

12503457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 12503457 is about 3536.0227657638. The cubic root of 12503457 is about 232.1008343388.

Adding to 12503457 its reverse (75430521), we get a palindrome (87933978).

The spelling of 12503457 in words is "twelve million, five hundred three thousand, four hundred fifty-seven".