2041661 has 2 divisors, whose sum is σ = 2041662. Its totient is φ = 2041660.

The previous prime is 2041643. The next prime is 2041681. The reversal of 2041661 is 1661402.

It is a happy number.

It is an a-pointer prime, because the next prime (2041681) can be obtained adding 2041661 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 109561 = 1390^2 + 331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2041661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2041601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020830 + 1020831.

It is an arithmetic number, because the mean of its divisors is an integer number (1020831).

2^2041661 is an apocalyptic number.

It is an amenable number.

2041661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2041661 is an equidigital number, since it uses as much as digits as its factorization.

2041661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2041661 is about 1428.8670337019. The cubic root of 2041661 is about 126.8609261489.

The spelling of 2041661 in words is "two million, forty-one thousand, six hundred sixty-one".