12688001 has 4 divisors (see below), whose sum is σ = 13434372. Its totient is φ = 11941632.

The previous prime is 12687989. The next prime is 12688033. The reversal of 12688001 is 10088621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10088621 = 1951 ⋅5171.

It can be written as a sum of positive squares in 2 ways, for example, as 10660225 + 2027776 = 3265^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 12688001 - 2¹⁰ = 12686977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12688201) 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, 373160 + ... + 373193.

It is an arithmetic number, because the mean of its divisors is an integer number (3358593).

Almost surely, 2^12688001 is an apocalyptic number.

It is an amenable number.

12688001 is a deficient number, since it is larger than the sum of its proper divisors (746371).

12688001 is an equidigital number, since it uses as much as digits as its factorization.

12688001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746370.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 12688001 is about 3562.0220381126. The cubic root of 12688001 is about 233.2371546922.

The spelling of 12688001 in words is "twelve million, six hundred eighty-eight thousand, one".