12640003 has 2 divisors, whose sum is σ = 12640004. Its totient is φ = 12640002.

The previous prime is 12639989. The next prime is 12640009. The reversal of 12640003 is 30004621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12640003 - 2¹⁷ = 12508931 is a prime.

It is not a weakly prime, because it can be changed into another prime (12640009) 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, 6320001 + 6320002.

It is an arithmetic number, because the mean of its divisors is an integer number (6320002).

Almost surely, 2^12640003 is an apocalyptic number.

12640003 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640003 is an equidigital number, since it uses as much as digits as its factorization.

12640003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12640003 is about 3555.2781888342. The cubic root of 12640003 is about 232.9426753314.

Adding to 12640003 its reverse (30004621), we get a palindrome (42644624).

The spelling of 12640003 in words is "twelve million, six hundred forty thousand, three".