12641913 has 20 divisors (see below), whose sum is σ = 19091380. Its totient is φ = 8335872.

The previous prime is 12641869. The next prime is 12641917. The reversal of 12641913 is 31914621.

12641913 is a `hidden beast` number, since 1 + 2 + 641 + 9 + 13 = 666.

12641913 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9809424 + 2832489 = 3132^2 + 1683^2 .

It is not a de Polignac number, because 12641913 - 2¹⁰ = 12640889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641917) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7053 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (954569).

Almost surely, 2^12641913 is an apocalyptic number.

It is an amenable number.

12641913 is a deficient number, since it is larger than the sum of its proper divisors (6449467).

12641913 is an equidigital number, since it uses as much as digits as its factorization.

12641913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 1709 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 12641913 is about 3555.5467933920. The cubic root of 12641913 is about 232.9544078734.

The spelling of 12641913 in words is "twelve million, six hundred forty-one thousand, nine hundred thirteen".