12671556 has 48 divisors (see below), whose sum is σ = 31416000. Its totient is φ = 3964032.

The previous prime is 12671543. The next prime is 12671557. The reversal of 12671556 is 65517621.

12671556 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×12671556² = 321136662922272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12671557) 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, 33786 + ... + 34158.

It is an arithmetic number, because the mean of its divisors is an integer number (654500).

Almost surely, 2^12671556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12671556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15708000).

12671556 is an abundant number, since it is smaller than the sum of its proper divisors (18744444).

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

12671556 is a wasteful number, since it uses less digits than its factorization.

12671556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 546 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 12671556 is about 3559.7129097724. The cubic root of 12671556 is about 233.1363443988.

The spelling of 12671556 in words is "twelve million, six hundred seventy-one thousand, five hundred fifty-six".