2681491 has 8 divisors (see below), whose sum is σ = 2787840. Its totient is φ = 2577288.

The previous prime is 2681477. The next prime is 2681507. The reversal of 2681491 is 1941862.

It is a happy number.

2681491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2681491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2681191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2290 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (348480).

2^2681491 is an apocalyptic number.

2681491 is a deficient number, since it is larger than the sum of its proper divisors (106349).

2681491 is an equidigital number, since it uses as much as digits as its factorization.

2681491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its digits is 3456, while the sum is 31.

The square root of 2681491 is about 1637.5258776581. The cubic root of 2681491 is about 138.9287456339.

The spelling of 2681491 in words is "two million, six hundred eighty-one thousand, four hundred ninety-one".