12978785 has 8 divisors (see below), whose sum is σ = 16251840. Its totient is φ = 9931504.

The previous prime is 12978773. The next prime is 12978809. The reversal of 12978785 is 58787921.

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

It is a cyclic number.

It is not a de Polignac number, because 12978785 - 2⁸ = 12978529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56315 + ... + 56544.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^12978785 is an apocalyptic number.

It is an amenable number.

12978785 is a deficient number, since it is larger than the sum of its proper divisors (3273055).

12978785 is a wasteful number, since it uses less digits than its factorization.

12978785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112887.

The product of its digits is 282240, while the sum is 47.

The square root of 12978785 is about 3602.6080830421. The cubic root of 12978785 is about 235.0054925531.

The spelling of 12978785 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred eighty-five".