3421861 has 2 divisors, whose sum is σ = 3421862. Its totient is φ = 3421860.

The previous prime is 3421853. The next prime is 3421867. The reversal of 3421861 is 1681243.

3421861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 649636 = 1665^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421861 - 2³ = 3421853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3421867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710930 + 1710931.

It is an arithmetic number, because the mean of its divisors is an integer number (1710931).

Almost surely, 2^3421861 is an apocalyptic number.

It is an amenable number.

3421861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421861 is an equidigital number, since it uses as much as digits as its factorization.

3421861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 3421861 is about 1849.8272892354. The cubic root of 3421861 is about 150.6910484945.

The spelling of 3421861 in words is "three million, four hundred twenty-one thousand, eight hundred sixty-one".