4391217 has 12 divisors (see below), whose sum is σ = 6364020. Its totient is φ = 2917728.

The previous prime is 4391161. The next prime is 4391221. The reversal of 4391217 is 7121934.

It can be written as a sum of positive squares in 2 ways, for example, as 3837681 + 553536 = 1959^2 + 744^2 .

It is not a de Polignac number, because 4391217 - 2⁷ = 4391089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4391227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2959 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (530335).

Almost surely, 2^4391217 is an apocalyptic number.

It is an amenable number.

4391217 is a deficient number, since it is larger than the sum of its proper divisors (1972803).

4391217 is a wasteful number, since it uses less digits than its factorization.

4391217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1629 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 4391217 is about 2095.5230850554. The cubic root of 4391217 is about 163.7551496933.

The spelling of 4391217 in words is "four million, three hundred ninety-one thousand, two hundred seventeen".