12871122 has 64 divisors (see below), whose sum is σ = 29998080. Its totient is φ = 3643200.

The previous prime is 12871109. The next prime is 12871129. The reversal of 12871122 is 22117821.

It is a junction number, because it is equal to n+sod(n) for n = 12871092 and 12871101.

It is not an unprimeable number, because it can be changed into a prime (12871129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92529 + ... + 92667.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^12871122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12871122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14999040).

12871122 is an abundant number, since it is smaller than the sum of its proper divisors (17126958).

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

12871122 is a wasteful number, since it uses less digits than its factorization.

12871122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 448, while the sum is 24.

The square root of 12871122 is about 3587.6345967782. The cubic root of 12871122 is about 234.3538732246.

Adding to 12871122 its reverse (22117821), we get a palindrome (34988943).

The spelling of 12871122 in words is "twelve million, eight hundred seventy-one thousand, one hundred twenty-two".