12722176 has 28 divisors (see below), whose sum is σ = 25459182. Its totient is φ = 6356992.

The previous prime is 12722167. The next prime is 12722179. The reversal of 12722176 is 67122721.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 331776 = 3520^2 + 576^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12722179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7416 + ... + 8968.

Almost surely, 2^12722176 is an apocalyptic number.

12722176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12722176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12729591).

12722176 is an abundant number, since it is smaller than the sum of its proper divisors (12737006).

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

12722176 is an frugal number, since it uses more digits than its factorization.

12722176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1555 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 12722176 is about 3566.8159470318. The cubic root of 12722176 is about 233.4463742522.

Adding to 12722176 its reverse (67122721), we get a palindrome (79844897).

The spelling of 12722176 in words is "twelve million, seven hundred twenty-two thousand, one hundred seventy-six".