12978654 has 16 divisors (see below), whose sum is σ = 27954192. Its totient is φ = 3993408.

The previous prime is 12978629. The next prime is 12978659. The reversal of 12978654 is 45687921.

12978654 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978659) 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, 83119 + ... + 83274.

It is an arithmetic number, because the mean of its divisors is an integer number (1747137).

Almost surely, 2^12978654 is an apocalyptic number.

12978654 is an abundant number, since it is smaller than the sum of its proper divisors (14975538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12978654 is a wasteful number, since it uses less digits than its factorization.

12978654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166411.

The product of its digits is 120960, while the sum is 42.

The square root of 12978654 is about 3602.5899017235. The cubic root of 12978654 is about 235.0047018827.

The spelling of 12978654 in words is "twelve million, nine hundred seventy-eight thousand, six hundred fifty-four".