12812775 has 12 divisors (see below), whose sum is σ = 21183912. Its totient is φ = 6833440.

The previous prime is 12812749. The next prime is 12812777. The reversal of 12812775 is 57721821.

12812775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12812775 - 2⁷ = 12812647 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12812777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85344 + ... + 85493.

It is an arithmetic number, because the mean of its divisors is an integer number (1765326).

Almost surely, 2^12812775 is an apocalyptic number.

12812775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12812775 is a deficient number, since it is larger than the sum of its proper divisors (8371137).

12812775 is a wasteful number, since it uses less digits than its factorization.

12812775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170850 (or 170845 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 12812775 is about 3579.4936792792. The cubic root of 12812775 is about 233.9992146953. Note that the first 3 decimals are identical.

The spelling of 12812775 in words is "twelve million, eight hundred twelve thousand, seven hundred seventy-five".