2491011 has 6 divisors (see below), whose sum is σ = 3598140. Its totient is φ = 1660668.

The previous prime is 2491009. The next prime is 2491031. The reversal of 2491011 is 1101942.

It is not a de Polignac number, because 2491011 - 2¹ = 2491009 is a prime.

2491011 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2491001) 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 5 ways as a sum of consecutive naturals, for example, 138381 + ... + 138398.

It is an arithmetic number, because the mean of its divisors is an integer number (599690).

2^2491011 is an apocalyptic number.

2491011 is a deficient number, since it is larger than the sum of its proper divisors (1107129).

2491011 is a wasteful number, since it uses less digits than its factorization.

2491011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276785 (or 276782 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2491011 is about 1578.2936989040. The cubic root of 2491011 is about 135.5580194790.

Adding to 2491011 its reverse (1101942), we get a palindrome (3592953).

The spelling of 2491011 in words is "two million, four hundred ninety-one thousand, eleven".