2002491 has 6 divisors (see below), whose sum is σ = 2892500. Its totient is φ = 1334988.

The previous prime is 2002471. The next prime is 2002523. The reversal of 2002491 is 1942002.

It is not a de Polignac number, because 2002491 - 2⁵ = 2002459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111241 + ... + 111258.

2^2002491 is an apocalyptic number.

2002491 is a deficient number, since it is larger than the sum of its proper divisors (890009).

2002491 is a wasteful number, since it uses less digits than its factorization.

2002491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222505 (or 222502 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2002491 is about 1415.0939898113. The cubic root of 2002491 is about 126.0443910103.

Adding to 2002491 its reverse (1942002), we get a palindrome (3944493).

The spelling of 2002491 in words is "two million, two thousand, four hundred ninety-one".