12141661 has 18 divisors (see below), whose sum is σ = 14596218. Its totient is φ = 10069920.

The previous prime is 12141643. The next prime is 12141667. The reversal of 12141661 is 16614121.

12141661 = 368² + 369² + ... + 441².

12141661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 2869636 + 9272025 = 1694^2 + 3045^2 .

It is not a de Polignac number, because 12141661 - 2⁹ = 12141149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141667) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66991 + ... + 67171.

It is an arithmetic number, because the mean of its divisors is an integer number (810901).

Almost surely, 2^12141661 is an apocalyptic number.

It is an amenable number.

12141661 is a deficient number, since it is larger than the sum of its proper divisors (2454557).

12141661 is an equidigital number, since it uses as much as digits as its factorization.

12141661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 225 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 12141661 is about 3484.4886281921. The cubic root of 12141661 is about 229.8402229948.

Adding to 12141661 its reverse (16614121), we get a palindrome (28755782).

The spelling of 12141661 in words is "twelve million, one hundred forty-one thousand, six hundred sixty-one".