3867217 has 4 divisors (see below), whose sum is σ = 3930676. Its totient is φ = 3803760.

The previous prime is 3867209. The next prime is 3867221. The reversal of 3867217 is 7127683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7127683 = 193 ⋅36931.

It can be written as a sum of positive squares in 2 ways, for example, as 641601 + 3225616 = 801^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 3867217 - 2³ = 3867209 is a prime.

It is a Duffinian number.

3867217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3867257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31638 + ... + 31759.

It is an arithmetic number, because the mean of its divisors is an integer number (982669).

Almost surely, 2^3867217 is an apocalyptic number.

It is an amenable number.

3867217 is a deficient number, since it is larger than the sum of its proper divisors (63459).

3867217 is an equidigital number, since it uses as much as digits as its factorization.

3867217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63458.

The product of its digits is 14112, while the sum is 34.

The square root of 3867217 is about 1966.5240908771. The cubic root of 3867217 is about 156.9638035749.

The spelling of 3867217 in words is "three million, eight hundred sixty-seven thousand, two hundred seventeen".