12641967 has 16 divisors (see below), whose sum is σ = 20170080. Its totient is φ = 7779456.

The previous prime is 12641963. The next prime is 12641969. The reversal of 12641967 is 76914621.

12641967 is a `hidden beast` number, since 1 + 2 + 641 + 9 + 6 + 7 = 666.

12641967 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12641967 - 2² = 12641963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17658 + ... + 18359.

It is an arithmetic number, because the mean of its divisors is an integer number (1260630).

Almost surely, 2^12641967 is an apocalyptic number.

12641967 is a deficient number, since it is larger than the sum of its proper divisors (7528113).

12641967 is a wasteful number, since it uses less digits than its factorization.

12641967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36039 (or 36033 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12641967 is about 3555.5543871526. The cubic root of 12641967 is about 232.9547395616.

The spelling of 12641967 in words is "twelve million, six hundred forty-one thousand, nine hundred sixty-seven".