3405217 has 2 divisors, whose sum is σ = 3405218. Its totient is φ = 3405216.

The previous prime is 3405191. The next prime is 3405247. The reversal of 3405217 is 7125043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2692881 + 712336 = 1641^2 + 844^2 .

It is an emirp because it is prime and its reverse (7125043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3405217 is a prime.

It is not a weakly prime, because it can be changed into another prime (3405247) 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, 1702608 + 1702609.

It is an arithmetic number, because the mean of its divisors is an integer number (1702609).

Almost surely, 2^3405217 is an apocalyptic number.

It is an amenable number.

3405217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405217 is an equidigital number, since it uses as much as digits as its factorization.

3405217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 3405217 is about 1845.3230069557. The cubic root of 3405217 is about 150.4463298730.

The spelling of 3405217 in words is "three million, four hundred five thousand, two hundred seventeen".