3845217 has 4 divisors (see below), whose sum is σ = 5126960. Its totient is φ = 2563476.

The previous prime is 3845183. The next prime is 3845221. The reversal of 3845217 is 7125483.

3845217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3845217 - 2¹² = 3841121 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3845287) 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 in 3 ways as a sum of consecutive naturals, for example, 640867 + ... + 640872.

It is an arithmetic number, because the mean of its divisors is an integer number (1281740).

Almost surely, 2^3845217 is an apocalyptic number.

It is an amenable number.

3845217 is a deficient number, since it is larger than the sum of its proper divisors (1281743).

3845217 is a wasteful number, since it uses less digits than its factorization.

3845217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281742.

The product of its digits is 6720, while the sum is 30.

The square root of 3845217 is about 1960.9224869943. The cubic root of 3845217 is about 156.6655897517.

The spelling of 3845217 in words is "three million, eight hundred forty-five thousand, two hundred seventeen".