12777387 has 24 divisors (see below), whose sum is σ = 20987856. Its totient is φ = 6870528.

The previous prime is 12777383. The next prime is 12777431. The reversal of 12777387 is 78377721.

It is not a de Polignac number, because 12777387 - 2² = 12777383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58 + ... + 5055.

It is an arithmetic number, because the mean of its divisors is an integer number (874494).

Almost surely, 2^12777387 is an apocalyptic number.

12777387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12777387 is a deficient number, since it is larger than the sum of its proper divisors (8210469).

12777387 is a wasteful number, since it uses less digits than its factorization.

12777387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147 (or 5140 counting only the distinct ones).

The product of its digits is 115248, while the sum is 42.

The square root of 12777387 is about 3574.5471041798. The cubic root of 12777387 is about 233.7835861641.

The spelling of 12777387 in words is "twelve million, seven hundred seventy-seven thousand, three hundred eighty-seven".