12777222 has 8 divisors (see below), whose sum is σ = 25554456. Its totient is φ = 4259072.

The previous prime is 12777221. The next prime is 12777277. The reversal of 12777222 is 22277721.

12777222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12777222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 12777222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064763 + ... + 1064774.

It is an arithmetic number, because the mean of its divisors is an integer number (3194307).

Almost surely, 2^12777222 is an apocalyptic number.

12777222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12777222 is a wasteful number, since it uses less digits than its factorization.

12777222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129542.

The product of its digits is 5488, while the sum is 30.

The square root of 12777222 is about 3574.5240242583. The cubic root of 12777222 is about 233.7825798431.

The spelling of 12777222 in words is "twelve million, seven hundred seventy-seven thousand, two hundred twenty-two".