4491043 has 4 divisors (see below), whose sum is σ = 4755240. Its totient is φ = 4226848.

The previous prime is 4491037. The next prime is 4491079. The reversal of 4491043 is 3401944.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4491043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4490999 and 4491017.

It is not an unprimeable number, because it can be changed into a prime (4491013) 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, 132073 + ... + 132106.

It is an arithmetic number, because the mean of its divisors is an integer number (1188810).

Almost surely, 2^4491043 is an apocalyptic number.

4491043 is a deficient number, since it is larger than the sum of its proper divisors (264197).

4491043 is a wasteful number, since it uses less digits than its factorization.

4491043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264196.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 4491043 is about 2119.2081068173. The cubic root of 4491043 is about 164.9867513084.

Adding to 4491043 its reverse (3401944), we get a palindrome (7892987).

The spelling of 4491043 in words is "four million, four hundred ninety-one thousand, forty-three".