2491111 has 6 divisors (see below), whose sum is σ = 2897880. Its totient is φ = 2135196.

The previous prime is 2491091. The next prime is 2491117. The reversal of 2491111 is 1111942.

It is not a de Polignac number, because 2491111 - 2⁹ = 2490599 is a prime.

It is a Duffinian number.

2491111 is a modest number, since divided by 1111 gives 249 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25371 + ... + 25468.

It is an arithmetic number, because the mean of its divisors is an integer number (482980).

2^2491111 is an apocalyptic number.

2491111 is a deficient number, since it is larger than the sum of its proper divisors (406769).

2491111 is an equidigital number, since it uses as much as digits as its factorization.

2491111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50853 (or 50846 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

The square root of 2491111 is about 1578.3253783678. The cubic root of 2491111 is about 135.5598334173.

The spelling of 2491111 in words is "two million, four hundred ninety-one thousand, one hundred eleven".