12908005 has 16 divisors (see below), whose sum is σ = 17357184. Its totient is φ = 9132480.

The previous prime is 12907969. The next prime is 12908039. The reversal of 12908005 is 50080921.

12908005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12908005 - 2⁹ = 12907493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (1084824).

Almost surely, 2^12908005 is an apocalyptic number.

It is an amenable number.

12908005 is a deficient number, since it is larger than the sum of its proper divisors (4449179).

12908005 is a wasteful number, since it uses less digits than its factorization.

12908005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 12908005 is about 3592.7712145362. The cubic root of 12908005 is about 234.5775116066.

Adding to 12908005 its reverse (50080921), we get a palindrome (62988926).

The spelling of 12908005 in words is "twelve million, nine hundred eight thousand, five".