2491003 has 4 divisors (see below), whose sum is σ = 2501928. Its totient is φ = 2480080.

The previous prime is 2491001. The next prime is 2491007. The reversal of 2491003 is 3001942.

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

It is a cyclic number.

It is not a de Polignac number, because 2491003 - 2¹ = 2491001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491001) 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, 5113 + ... + 5578.

It is an arithmetic number, because the mean of its divisors is an integer number (625482).

2^2491003 is an apocalyptic number.

2491003 is a deficient number, since it is larger than the sum of its proper divisors (10925).

2491003 is a wasteful number, since it uses less digits than its factorization.

2491003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10924.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2491003 is about 1578.2911645194. The cubic root of 2491003 is about 135.5578743619.

Adding to 2491003 its reverse (3001942), we get a palindrome (5492945).

The spelling of 2491003 in words is "two million, four hundred ninety-one thousand, three".