2491181 has 8 divisors (see below), whose sum is σ = 3105984. Its totient is φ = 1941120.

The previous prime is 2491171. The next prime is 2491189. The reversal of 2491181 is 1811942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491181 - 2⁶ = 2491117 is a prime.

It is a super-2 number, since 2×2491181² = 12411965549522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2491181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16100 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (388248).

2^2491181 is an apocalyptic number.

It is an amenable number.

2491181 is a deficient number, since it is larger than the sum of its proper divisors (614803).

2491181 is a wasteful number, since it uses less digits than its factorization.

2491181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32371.

The product of its digits is 576, while the sum is 26.

The square root of 2491181 is about 1578.3475536142. The cubic root of 2491181 is about 135.5611031452.

The spelling of 2491181 in words is "two million, four hundred ninety-one thousand, one hundred eighty-one".