12017771 has 4 divisors (see below), whose sum is σ = 12182472. Its totient is φ = 11853072.

The previous prime is 12017749. The next prime is 12017773. The reversal of 12017771 is 17771021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17771021 = 337 ⋅52733.

It is a cyclic number.

It is not a de Polignac number, because 12017771 - 2¹⁴ = 12001387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12017771.

It is not an unprimeable number, because it can be changed into a prime (12017773) 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 3 ways as a sum of consecutive naturals, for example, 82241 + ... + 82386.

It is an arithmetic number, because the mean of its divisors is an integer number (3045618).

Almost surely, 2^12017771 is an apocalyptic number.

12017771 is a deficient number, since it is larger than the sum of its proper divisors (164701).

12017771 is an equidigital number, since it uses as much as digits as its factorization.

12017771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164700.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 12017771 is about 3466.6656891024. The cubic root of 12017771 is about 229.0558078612.

Adding to 12017771 its reverse (17771021), we get a palindrome (29788792).

The spelling of 12017771 in words is "twelve million, seventeen thousand, seven hundred seventy-one".