12081356 has 36 divisors (see below), whose sum is σ = 25684848. Its totient is φ = 4869888.

The previous prime is 12081343. The next prime is 12081389. The reversal of 12081356 is 65318021.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7346 + ... + 8838.

It is an arithmetic number, because the mean of its divisors is an integer number (713468).

Almost surely, 2^12081356 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 12081356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12842424).

12081356 is an abundant number, since it is smaller than the sum of its proper divisors (13603492).

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

12081356 is a wasteful number, since it uses less digits than its factorization.

12081356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1519 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12081356 is about 3475.8245065020. The cubic root of 12081356 is about 229.4590690608.

Adding to 12081356 its reverse (65318021), we get a palindrome (77399377).

The spelling of 12081356 in words is "twelve million, eighty-one thousand, three hundred fifty-six".