12857775 has 48 divisors (see below), whose sum is σ = 25593600. Its totient is φ = 5564160.

The previous prime is 12857771. The next prime is 12857791. The reversal of 12857775 is 57775821.

12857775 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 12857775 - 2² = 12857771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9331 + ... + 10619.

It is an arithmetic number, because the mean of its divisors is an integer number (533200).

Almost surely, 2^12857775 is an apocalyptic number.

12857775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12857775 is a deficient number, since it is larger than the sum of its proper divisors (12735825).

12857775 is a wasteful number, since it uses less digits than its factorization.

12857775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 1323 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The square root of 12857775 is about 3585.7739750297. The cubic root of 12857775 is about 234.2728390314.

The spelling of 12857775 in words is "twelve million, eight hundred fifty-seven thousand, seven hundred seventy-five".