2381491 has 8 divisors (see below), whose sum is σ = 2731104. Its totient is φ = 2034240.

The previous prime is 2381473. The next prime is 2381497. The reversal of 2381491 is 1941832.

It is a happy number.

2381491 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 not a de Polignac number, because 2381491 - 2⁷ = 2381363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381497) 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, 3321 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (341388).

2^2381491 is an apocalyptic number.

2381491 is a deficient number, since it is larger than the sum of its proper divisors (349613).

2381491 is an equidigital number, since it uses as much as digits as its factorization.

2381491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its digits is 1728, while the sum is 28.

The square root of 2381491 is about 1543.2080222705. The cubic root of 2381491 is about 133.5415199073.

The spelling of 2381491 in words is "two million, three hundred eighty-one thousand, four hundred ninety-one".