12978118 has 16 divisors (see below), whose sum is σ = 20401920. Its totient is φ = 6179976.

The previous prime is 12978113. The next prime is 12978139. The reversal of 12978118 is 81187921.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13663 + ... + 14581.

It is an arithmetic number, because the mean of its divisors is an integer number (1275120).

Almost surely, 2^12978118 is an apocalyptic number.

12978118 is a deficient number, since it is larger than the sum of its proper divisors (7423802).

12978118 is a wasteful number, since it uses less digits than its factorization.

12978118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its digits is 8064, while the sum is 37.

The square root of 12978118 is about 3602.5155100291. The cubic root of 12978118 is about 235.0014667179.

The spelling of 12978118 in words is "twelve million, nine hundred seventy-eight thousand, one hundred eighteen".