1668241 has 2 divisors, whose sum is σ = 1668242. Its totient is φ = 1668240.

The previous prime is 1668229. The next prime is 1668253. The reversal of 1668241 is 1428661.

It is a balanced prime because it is at equal distance from previous prime (1668229) and next prime (1668253).

It can be written as a sum of positive squares in only one way, i.e., 1635841 + 32400 = 1279^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668241 - 2⁷ = 1668113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834120 + 834121.

It is an arithmetic number, because the mean of its divisors is an integer number (834121).

2^1668241 is an apocalyptic number.

It is an amenable number.

1668241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668241 is an equidigital number, since it uses as much as digits as its factorization.

1668241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 1668241 is about 1291.6040414926. The cubic root of 1668241 is about 118.6004299726.

The spelling of 1668241 in words is "one million, six hundred sixty-eight thousand, two hundred forty-one".