12645403 has 2 divisors, whose sum is σ = 12645404. Its totient is φ = 12645402.

The previous prime is 12645401. The next prime is 12645419. The reversal of 12645403 is 30454621.

12645403 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12645403 - 2¹ = 12645401 is a prime.

Together with 12645401, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12645401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322701 + 6322702.

It is an arithmetic number, because the mean of its divisors is an integer number (6322702).

Almost surely, 2^12645403 is an apocalyptic number.

12645403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645403 is an equidigital number, since it uses as much as digits as its factorization.

12645403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 12645403 is about 3556.0375419841. The cubic root of 12645403 is about 232.9758428171.

The spelling of 12645403 in words is "twelve million, six hundred forty-five thousand, four hundred three".