12640011 has 4 divisors (see below), whose sum is σ = 16853352. Its totient is φ = 8426672.

The previous prime is 12640009. The next prime is 12640021. The reversal of 12640011 is 11004621.

12640011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12640011 - 2¹ = 12640009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12640021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106666 + ... + 2106671.

It is an arithmetic number, because the mean of its divisors is an integer number (4213338).

Almost surely, 2^12640011 is an apocalyptic number.

12640011 is a deficient number, since it is larger than the sum of its proper divisors (4213341).

12640011 is an equidigital number, since it uses as much as digits as its factorization.

12640011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213340.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 12640011 is about 3555.2793139218. The cubic root of 12640011 is about 232.9427244754.

Adding to 12640011 its reverse (11004621), we get a palindrome (23644632).

The spelling of 12640011 in words is "twelve million, six hundred forty thousand, eleven".