12786885 has 12 divisors (see below), whose sum is σ = 22164012. Its totient is φ = 6819648.

The previous prime is 12786871. The next prime is 12786889. The reversal of 12786885 is 58868721.

It can be written as a sum of positive squares in 2 ways, for example, as 10074276 + 2712609 = 3174^2 + 1647^2 .

It is not a de Polignac number, because 12786885 - 2¹² = 12782789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 284153 = 12786885 / (1 + 2 + 7 + 8 + 6 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 12786885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12786889) 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 11 ways as a sum of consecutive naturals, for example, 142032 + ... + 142121.

It is an arithmetic number, because the mean of its divisors is an integer number (1847001).

Almost surely, 2^12786885 is an apocalyptic number.

12786885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12786885 is a deficient number, since it is larger than the sum of its proper divisors (9377127).

12786885 is a wasteful number, since it uses less digits than its factorization.

12786885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284164 (or 284161 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 12786885 is about 3575.8754172929. The cubic root of 12786885 is about 233.8414990622.

The spelling of 12786885 in words is "twelve million, seven hundred eighty-six thousand, eight hundred eighty-five".