2491136 has 36 divisors (see below), whose sum is σ = 5126352. Its totient is φ = 1207296.

The previous prime is 2491123. The next prime is 2491171. The reversal of 2491136 is 6311942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9341 + ... + 9603.

2^2491136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563176).

2491136 is an abundant number, since it is smaller than the sum of its proper divisors (2635216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2491136 is an equidigital number, since it uses as much as digits as its factorization.

2491136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 302 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 2491136 is about 1578.3332981345. Note that the first 3 decimals coincide. The cubic root of 2491136 is about 135.5602868943.

The spelling of 2491136 in words is "two million, four hundred ninety-one thousand, one hundred thirty-six".