12271056 has 80 divisors (see below), whose sum is σ = 36902400. Its totient is φ = 3441024.

The previous prime is 12271027. The next prime is 12271069. The reversal of 12271056 is 65017221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19515 + ... + 20133.

It is an arithmetic number, because the mean of its divisors is an integer number (461280).

Almost surely, 2^12271056 is an apocalyptic number.

12271056 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 12271056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18451200).

12271056 is an abundant number, since it is smaller than the sum of its proper divisors (24631344).

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

12271056 is a wasteful number, since it uses less digits than its factorization.

12271056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12271056 is about 3503.0067085291. The cubic root of 12271056 is about 230.6538170232.

Adding to 12271056 its reverse (65017221), we get a palindrome (77288277).

The spelling of 12271056 in words is "twelve million, two hundred seventy-one thousand, fifty-six".