12940647 has 16 divisors (see below), whose sum is σ = 17729280. Its totient is φ = 8392832.

The previous prime is 12940643. The next prime is 12940649. The reversal of 12940647 is 74604921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12940647 - 2² = 12940643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12940643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19678 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (1108080).

Almost surely, 2^12940647 is an apocalyptic number.

12940647 is a deficient number, since it is larger than the sum of its proper divisors (4788633).

12940647 is a wasteful number, since it uses less digits than its factorization.

12940647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 12940647 is about 3597.3110791256. The cubic root of 12940647 is about 234.7750798012.

The spelling of 12940647 in words is "twelve million, nine hundred forty thousand, six hundred forty-seven".