12978503 has 8 divisors (see below), whose sum is σ = 13314672. Its totient is φ = 12646656.

The previous prime is 12978499. The next prime is 12978517. The reversal of 12978503 is 30587921.

12978503 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12978503 - 2² = 12978499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5501 + ... + 7497.

It is an arithmetic number, because the mean of its divisors is an integer number (1664334).

Almost surely, 2^12978503 is an apocalyptic number.

12978503 is a deficient number, since it is larger than the sum of its proper divisors (336169).

12978503 is an equidigital number, since it uses as much as digits as its factorization.

12978503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 12978503 is about 3602.5689445172. The cubic root of 12978503 is about 235.0037904927.

The spelling of 12978503 in words is "twelve million, nine hundred seventy-eight thousand, five hundred three".