12560905 has 24 divisors (see below), whose sum is σ = 17696448. Its totient is φ = 8533728.

The previous prime is 12560903. The next prime is 12560927. The reversal of 12560905 is 50906521.

It is not a de Polignac number, because 12560905 - 2¹ = 12560903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12560903) 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 in 23 ways as a sum of consecutive naturals, for example, 40762 + ... + 41068.

It is an arithmetic number, because the mean of its divisors is an integer number (737352).

Almost surely, 2^12560905 is an apocalyptic number.

It is an amenable number.

12560905 is a deficient number, since it is larger than the sum of its proper divisors (5135543).

12560905 is a wasteful number, since it uses less digits than its factorization.

12560905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 12560905 is about 3544.1367072956. The cubic root of 12560905 is about 232.4557591083.

The spelling of 12560905 in words is "twelve million, five hundred sixty thousand, nine hundred five".