2544491 has 4 divisors (see below), whose sum is σ = 2550000. Its totient is φ = 2538984.

The previous prime is 2544481. The next prime is 2544497. The reversal of 2544491 is 1944452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2544491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (637500).

2^2544491 is an apocalyptic number.

2544491 is a deficient number, since it is larger than the sum of its proper divisors (5509).

2544491 is an equidigital number, since it uses as much as digits as its factorization.

2544491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508.

The product of its digits is 5760, while the sum is 29.

The square root of 2544491 is about 1595.1460748157. The cubic root of 2544491 is about 136.5212658124.

The spelling of 2544491 in words is "two million, five hundred forty-four thousand, four hundred ninety-one".