12800001 has 4 divisors (see below), whose sum is σ = 17066672. Its totient is φ = 8533332.

The previous prime is 12799987. The next prime is 12800009. The reversal of 12800001 is 10000821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12800001 - 2¹⁵ = 12767233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12800001.

It is not an unprimeable number, because it can be changed into a prime (12800009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133331 + ... + 2133336.

It is an arithmetic number, because the mean of its divisors is an integer number (4266668).

It is a Proth number, since it is equal to 3125 ⋅ 2¹² + 1 and 3125 < 2¹².

Almost surely, 2^12800001 is an apocalyptic number.

It is an amenable number.

12800001 is a deficient number, since it is larger than the sum of its proper divisors (4266671).

12800001 is an equidigital number, since it uses as much as digits as its factorization.

12800001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266670.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 12800001 is about 3577.7089037539. The cubic root of 12800001 is about 233.9214251487.

Adding to 12800001 its reverse (10000821), we get a palindrome (22800822).

The spelling of 12800001 in words is "twelve million, eight hundred thousand, one".