12777885 has 16 divisors (see below), whose sum is σ = 22716480. Its totient is φ = 6814800.

The previous prime is 12777827. The next prime is 12777889. The reversal of 12777885 is 58877721.

It is not a de Polignac number, because 12777885 - 2⁸ = 12777629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12777885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777889) 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, 47191 + ... + 47460.

It is an arithmetic number, because the mean of its divisors is an integer number (1419780).

Almost surely, 2^12777885 is an apocalyptic number.

12777885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12777885 is a deficient number, since it is larger than the sum of its proper divisors (9938595).

12777885 is an equidigital number, since it uses as much as digits as its factorization.

12777885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94665 (or 94659 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 12777885 is about 3574.6167626754. The cubic root of 12777885 is about 233.7866233712.

The spelling of 12777885 in words is "twelve million, seven hundred seventy-seven thousand, eight hundred eighty-five".