12947408 has 10 divisors (see below), whose sum is σ = 25085634. Its totient is φ = 6473696.

The previous prime is 12947401. The next prime is 12947411. The reversal of 12947408 is 80474921.

12947408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12902464 + 44944 = 3592^2 + 212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12947401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404591 + ... + 404622.

Almost surely, 2^12947408 is an apocalyptic number.

It is an amenable number.

12947408 is a deficient number, since it is larger than the sum of its proper divisors (12138226).

12947408 is an equidigital number, since it uses as much as digits as its factorization.

12947408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809221 (or 809215 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 12947408 is about 3598.2506860973. The cubic root of 12947408 is about 234.8159597242.

The spelling of 12947408 in words is "twelve million, nine hundred forty-seven thousand, four hundred eight".