12641478 has 16 divisors (see below), whose sum is σ = 25359600. Its totient is φ = 4201056.

The previous prime is 12641443. The next prime is 12641509. The reversal of 12641478 is 87414621.

It is a congruent number.

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, 925 + ... + 5112.

It is an arithmetic number, because the mean of its divisors is an integer number (1584975).

Almost surely, 2^12641478 is an apocalyptic number.

12641478 is an abundant number, since it is smaller than the sum of its proper divisors (12718122).

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

12641478 is a wasteful number, since it uses less digits than its factorization.

12641478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391.

The product of its digits is 10752, while the sum is 33.

The square root of 12641478 is about 3555.4856208400. The cubic root of 12641478 is about 232.9517359063.

The spelling of 12641478 in words is "twelve million, six hundred forty-one thousand, four hundred seventy-eight".