12987222 has 32 divisors (see below), whose sum is σ = 28089600. Its totient is φ = 3989088.

The previous prime is 12987217. The next prime is 12987229. The reversal of 12987222 is 22278921.

12987222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987229) 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, 2679 + ... + 5757.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^12987222 is an apocalyptic number.

12987222 is an abundant number, since it is smaller than the sum of its proper divisors (15102378).

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

12987222 is a wasteful number, since it uses less digits than its factorization.

12987222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its digits is 8064, while the sum is 33.

The square root of 12987222 is about 3603.7788500406. The cubic root of 12987222 is about 235.0564041462.

The spelling of 12987222 in words is "twelve million, nine hundred eighty-seven thousand, two hundred twenty-two".