12905803 has 2 divisors, whose sum is σ = 12905804. Its totient is φ = 12905802.

The previous prime is 12905773. The next prime is 12905861. The reversal of 12905803 is 30850921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12905803 is a prime.

It is not a weakly prime, because it can be changed into another prime (12905863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452901 + 6452902.

It is an arithmetic number, because the mean of its divisors is an integer number (6452902).

Almost surely, 2^12905803 is an apocalyptic number.

12905803 is a deficient number, since it is larger than the sum of its proper divisors (1).

12905803 is an equidigital number, since it uses as much as digits as its factorization.

12905803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12905803 is about 3592.4647527846. The cubic root of 12905803 is about 234.5641718469.

The spelling of 12905803 in words is "twelve million, nine hundred five thousand, eight hundred three".