4491001 has 8 divisors (see below), whose sum is σ = 4661504. Its totient is φ = 4322160.

The previous prime is 4490999. The next prime is 4491007. The reversal of 4491001 is 1001944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4491001 - 2¹ = 4490999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4491001.

It is not an unprimeable number, because it can be changed into a prime (4491007) 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 7 ways as a sum of consecutive naturals, for example, 8326 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (582688).

Almost surely, 2^4491001 is an apocalyptic number.

It is an amenable number.

4491001 is a deficient number, since it is larger than the sum of its proper divisors (170503).

4491001 is a wasteful number, since it uses less digits than its factorization.

4491001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 4491001 is about 2119.1981974322. The cubic root of 4491001 is about 164.9862369910.

Adding to 4491001 its reverse (1001944), we get a palindrome (5492945).

The spelling of 4491001 in words is "four million, four hundred ninety-one thousand, one".