12489878 has 12 divisors (see below), whose sum is σ = 19773900. Its totient is φ = 5915916.

The previous prime is 12489877. The next prime is 12489899. The reversal of 12489878 is 87898421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12489877) 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 5 ways as a sum of consecutive naturals, for example, 7928 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (1647825).

Almost surely, 2^12489878 is an apocalyptic number.

12489878 is a deficient number, since it is larger than the sum of its proper divisors (7284022).

12489878 is a wasteful number, since it uses less digits than its factorization.

12489878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17339 (or 17320 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 12489878 is about 3534.1021490613. The cubic root of 12489878 is about 232.0167818816.

The spelling of 12489878 in words is "twelve million, four hundred eighty-nine thousand, eight hundred seventy-eight".