3906211 has 4 divisors (see below), whose sum is σ = 3913624. Its totient is φ = 3898800.

The previous prime is 3906187. The next prime is 3906247. The reversal of 3906211 is 1126093.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(3906211) divides (3906211-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 3906211 - 2¹³ = 3898019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906611) 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 in 3 ways as a sum of consecutive naturals, for example, 2850 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (978406).

Almost surely, 2^3906211 is an apocalyptic number.

3906211 is a deficient number, since it is larger than the sum of its proper divisors (7413).

3906211 is an equidigital number, since it uses as much as digits as its factorization.

3906211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7412.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 3906211 is about 1976.4136712743. The cubic root of 3906211 is about 157.4896071080.

The spelling of 3906211 in words is "three million, nine hundred six thousand, two hundred eleven".