12905105 has 8 divisors (see below), whose sum is σ = 15608832. Its totient is φ = 10242288.

The previous prime is 12905077. The next prime is 12905111. The reversal of 12905105 is 50150921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12905105 - 2⁶ = 12905041 is a prime.

It is a super-2 number, since 2×12905105² = 333083470122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 9527 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (1951104).

Almost surely, 2^12905105 is an apocalyptic number.

It is an amenable number.

12905105 is a deficient number, since it is larger than the sum of its proper divisors (2703727).

12905105 is a wasteful number, since it uses less digits than its factorization.

12905105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 12905105 is about 3592.3676036842. The cubic root of 12905105 is about 234.5599430323.

The spelling of 12905105 in words is "twelve million, nine hundred five thousand, one hundred five".