12919845 has 16 divisors (see below), whose sum is σ = 21231360. Its totient is φ = 6704064.

The previous prime is 12919843. The next prime is 12919853. The reversal of 12919845 is 54891921.

It is not a de Polignac number, because 12919845 - 2¹ = 12919843 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12919843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11085 + ... + 12194.

It is an arithmetic number, because the mean of its divisors is an integer number (1326960).

Almost surely, 2^12919845 is an apocalyptic number.

12919845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12919845 is a deficient number, since it is larger than the sum of its proper divisors (8311515).

12919845 is a wasteful number, since it uses less digits than its factorization.

12919845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23324.

The product of its digits is 25920, while the sum is 39.

The square root of 12919845 is about 3594.4185899809. The cubic root of 12919845 is about 234.6492125645.

The spelling of 12919845 in words is "twelve million, nine hundred nineteen thousand, eight hundred forty-five".