12671905 has 8 divisors (see below), whose sum is σ = 15530112. Its totient is φ = 9921648.

The previous prime is 12671887. The next prime is 12671921. The reversal of 12671905 is 50917621.

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 12671905 - 2¹¹ = 12669857 is a prime.

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, 26727 + ... + 27196.

It is an arithmetic number, because the mean of its divisors is an integer number (1941264).

Almost surely, 2^12671905 is an apocalyptic number.

It is an amenable number.

12671905 is a deficient number, since it is larger than the sum of its proper divisors (2858207).

12671905 is an equidigital number, since it uses as much as digits as its factorization.

12671905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53975.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 12671905 is about 3559.7619302420. The cubic root of 12671905 is about 233.1384847262.

The spelling of 12671905 in words is "twelve million, six hundred seventy-one thousand, nine hundred five".