12645401 has 2 divisors, whose sum is σ = 12645402. Its totient is φ = 12645400.

The previous prime is 12645389. The next prime is 12645403. The reversal of 12645401 is 10454621.

12645401 is digitally balanced in base 3, 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., 11833600 + 811801 = 3440^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 12645401 - 2⁶ = 12645337 is a prime.

It is a Sophie Germain prime.

Together with 12645403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12645403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322700 + 6322701.

It is an arithmetic number, because the mean of its divisors is an integer number (6322701).

Almost surely, 2^12645401 is an apocalyptic number.

It is an amenable number.

12645401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645401 is an equidigital number, since it uses as much as digits as its factorization.

12645401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 12645401 is about 3556.0372607722. The cubic root of 12645401 is about 232.9758305346.

The spelling of 12645401 in words is "twelve million, six hundred forty-five thousand, four hundred one".