12042661 has 2 divisors, whose sum is σ = 12042662. Its totient is φ = 12042660.

The previous prime is 12042659. The next prime is 12042671. The reversal of 12042661 is 16624021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10929636 + 1113025 = 3306^2 + 1055^2 .

It is an emirp because it is prime and its reverse (16624021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12042661 - 2¹ = 12042659 is a prime.

Together with 12042659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12042671) 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 as a sum of consecutive naturals, namely, 6021330 + 6021331.

It is an arithmetic number, because the mean of its divisors is an integer number (6021331).

Almost surely, 2^12042661 is an apocalyptic number.

It is an amenable number.

12042661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042661 is an equidigital number, since it uses as much as digits as its factorization.

12042661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12042661 is about 3470.2537371207. The cubic root of 12042661 is about 229.2138312768.

Adding to 12042661 its reverse (16624021), we get a palindrome (28666682).

The spelling of 12042661 in words is "twelve million, forty-two thousand, six hundred sixty-one".