12978103 has 4 divisors (see below), whose sum is σ = 13104208. Its totient is φ = 12852000.

The previous prime is 12978079. The next prime is 12978113. The reversal of 12978103 is 30187921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30187921 = 3229 ⋅9349.

It is a cyclic number.

It is not a de Polignac number, because 12978103 - 2¹⁷ = 12847031 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 (12978113) 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 3 ways as a sum of consecutive naturals, for example, 62898 + ... + 63103.

It is an arithmetic number, because the mean of its divisors is an integer number (3276052).

Almost surely, 2^12978103 is an apocalyptic number.

12978103 is a deficient number, since it is larger than the sum of its proper divisors (126105).

12978103 is a wasteful number, since it uses less digits than its factorization.

12978103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126104.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12978103 is about 3602.5134281499. The cubic root of 12978103 is about 235.0013761803.

The spelling of 12978103 in words is "twelve million, nine hundred seventy-eight thousand, one hundred three".