3470221 has 2 divisors, whose sum is σ = 3470222. Its totient is φ = 3470220.

The previous prime is 3470213. The next prime is 3470237. The reversal of 3470221 is 1220743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2924100 + 546121 = 1710^2 + 739^2 .

It is an emirp because it is prime and its reverse (1220743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3470221 - 2³ = 3470213 is a prime.

It is a Chen prime.

It is equal to p₂₄₈₂₃₀ and since 3470221 and 248230 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3470251) 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, 1735110 + 1735111.

It is an arithmetic number, because the mean of its divisors is an integer number (1735111).

Almost surely, 2^3470221 is an apocalyptic number.

It is an amenable number.

3470221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3470221 is an equidigital number, since it uses as much as digits as its factorization.

3470221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 3470221 is about 1862.8529195833. The cubic root of 3470221 is about 151.3976187816.

Adding to 3470221 its reverse (1220743), we get a palindrome (4690964).

The spelling of 3470221 in words is "three million, four hundred seventy thousand, two hundred twenty-one".