12865001 has 2 divisors, whose sum is σ = 12865002. Its totient is φ = 12865000.

The previous prime is 12864997. The next prime is 12865003. The reversal of 12865001 is 10056821.

12865001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7295401 + 5569600 = 2701^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 12865001 - 2² = 12864997 is a prime.

Together with 12865003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12865003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432500 + 6432501.

It is an arithmetic number, because the mean of its divisors is an integer number (6432501).

Almost surely, 2^12865001 is an apocalyptic number.

It is an amenable number.

12865001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865001 is an equidigital number, since it uses as much as digits as its factorization.

12865001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 12865001 is about 3586.7814262929. The cubic root of 12865001 is about 234.3167175021.

The spelling of 12865001 in words is "twelve million, eight hundred sixty-five thousand, one".