12912822 has 48 divisors (see below), whose sum is σ = 30423120. Its totient is φ = 3934656.

The previous prime is 12912773. The next prime is 12912847. The reversal of 12912822 is 22821921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32328 + ... + 32724.

It is an arithmetic number, because the mean of its divisors is an integer number (633815).

Almost surely, 2^12912822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12912822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15211560).

12912822 is an abundant number, since it is smaller than the sum of its proper divisors (17510298).

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

12912822 is a wasteful number, since it uses less digits than its factorization.

12912822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12912822 is about 3593.4415258913. The cubic root of 12912822 is about 234.6066877998.

Subtracting 12912822 from its reverse (22821921), we obtain a palindrome (9909099).

The spelling of 12912822 in words is "twelve million, nine hundred twelve thousand, eight hundred twenty-two".