12013771 has 24 divisors (see below), whose sum is σ = 15759360. Its totient is φ = 9046800.

The previous prime is 12013769. The next prime is 12013777. The reversal of 12013771 is 17731021.

It is not a de Polignac number, because 12013771 - 2¹ = 12013769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16350 + ... + 17068.

It is an arithmetic number, because the mean of its divisors is an integer number (656640).

Almost surely, 2^12013771 is an apocalyptic number.

12013771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12013771 is a deficient number, since it is larger than the sum of its proper divisors (3745589).

12013771 is a wasteful number, since it uses less digits than its factorization.

12013771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 12013771 is about 3466.0887178490. The cubic root of 12013771 is about 229.0303920305.

Adding to 12013771 its reverse (17731021), we get a palindrome (29744792).

The spelling of 12013771 in words is "twelve million, thirteen thousand, seven hundred seventy-one".