12720678 has 8 divisors (see below), whose sum is σ = 25441368. Its totient is φ = 4240224.

The previous prime is 12720649. The next prime is 12720707. The reversal of 12720678 is 87602721.

It is an interprime number because it is at equal distance from previous prime (12720649) and next prime (12720707).

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

12720678 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060051 + ... + 1060062.

It is an arithmetic number, because the mean of its divisors is an integer number (3180171).

Almost surely, 2^12720678 is an apocalyptic number.

12720678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12720678 is a wasteful number, since it uses less digits than its factorization.

12720678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120118.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 12720678 is about 3566.6059496390. The cubic root of 12720678 is about 233.4372113439.

The spelling of 12720678 in words is "twelve million, seven hundred twenty thousand, six hundred seventy-eight".