12400647 has 16 divisors (see below), whose sum is σ = 19164672. Its totient is φ = 6985440.

The previous prime is 12400643. The next prime is 12400669. The reversal of 12400647 is 74600421.

12400647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12400647 - 2² = 12400643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400643) 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, 2668 + ... + 5649.

It is an arithmetic number, because the mean of its divisors is an integer number (1197792).

Almost surely, 2^12400647 is an apocalyptic number.

12400647 is a deficient number, since it is larger than the sum of its proper divisors (6764025).

12400647 is an equidigital number, since it uses as much as digits as its factorization.

12400647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8398.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 12400647 is about 3521.4552389602. The cubic root of 12400647 is about 231.4629310254.

The spelling of 12400647 in words is "twelve million, four hundred thousand, six hundred forty-seven".