12947841 has 12 divisors (see below), whose sum is σ = 19159140. Its totient is φ = 8421120.

The previous prime is 12947819. The next prime is 12947843. The reversal of 12947841 is 14874921.

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 7817616 = 2265^2 + 2796^2 .

It is not a de Polignac number, because 12947841 - 2⁹ = 12947329 is a prime.

It is a super-2 number, since 2×12947841² = 335293173122562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12947796 and 12947805.

It is not an unprimeable number, because it can be changed into a prime (12947843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17176 + ... + 17913.

It is an arithmetic number, because the mean of its divisors is an integer number (1596595).

Almost surely, 2^12947841 is an apocalyptic number.

It is an amenable number.

12947841 is a deficient number, since it is larger than the sum of its proper divisors (6211299).

12947841 is a wasteful number, since it uses less digits than its factorization.

12947841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35136 (or 35133 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12947841 is about 3598.3108537201. The cubic root of 12947841 is about 234.8185773440.

The spelling of 12947841 in words is "twelve million, nine hundred forty-seven thousand, eight hundred forty-one".