12771318 has 64 divisors (see below), whose sum is σ = 31961088. Its totient is φ = 3317760.

The previous prime is 12771307. The next prime is 12771323. The reversal of 12771318 is 81317721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21846 + ... + 22422.

It is an arithmetic number, because the mean of its divisors is an integer number (499392).

Almost surely, 2^12771318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12771318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15980544).

12771318 is an abundant number, since it is smaller than the sum of its proper divisors (19189770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12771318 is a wasteful number, since it uses less digits than its factorization.

12771318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637.

The product of its digits is 2352, while the sum is 30.

The square root of 12771318 is about 3573.6980846177. The cubic root of 12771318 is about 233.7465661463.

The spelling of 12771318 in words is "twelve million, seven hundred seventy-one thousand, three hundred eighteen".