12890001 has 4 divisors (see below), whose sum is σ = 17186672. Its totient is φ = 8593332.

The previous prime is 12889997. The next prime is 12890027. The reversal of 12890001 is 10009821.

12890001 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 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 12890001 - 2² = 12889997 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 12890001.

It is not an unprimeable number, because it can be changed into a prime (12890071) 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, 2148331 + ... + 2148336.

It is an arithmetic number, because the mean of its divisors is an integer number (4296668).

Almost surely, 2^12890001 is an apocalyptic number.

It is an amenable number.

12890001 is a deficient number, since it is larger than the sum of its proper divisors (4296671).

12890001 is an equidigital number, since it uses as much as digits as its factorization.

12890001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296670.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 12890001 is about 3590.2647534687. The cubic root of 12890001 is about 234.4683984735.

Adding to 12890001 its reverse (10009821), we get a palindrome (22899822).

The spelling of 12890001 in words is "twelve million, eight hundred ninety thousand, one".