12723885 has 40 divisors (see below), whose sum is σ = 23130360. Its totient is φ = 6690816.

The previous prime is 12723833. The next prime is 12723889. The reversal of 12723885 is 58832721.

12723885 is a `hidden beast` number, since 1 + 272 + 388 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 149769 + 12574116 = 387^2 + 3546^2 .

It is not a de Polignac number, because 12723885 - 2⁸ = 12723629 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12723889) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 35869 + ... + 36221.

It is an arithmetic number, because the mean of its divisors is an integer number (578259).

Almost surely, 2^12723885 is an apocalyptic number.

12723885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12723885 is a deficient number, since it is larger than the sum of its proper divisors (10406475).

12723885 is an equidigital number, since it uses as much as digits as its factorization.

12723885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 450 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 12723885 is about 3567.0555083990. The cubic root of 12723885 is about 233.4568269187.

The spelling of 12723885 in words is "twelve million, seven hundred twenty-three thousand, eight hundred eighty-five".