2049543 has 10 divisors (see below), whose sum is σ = 3061784. Its totient is φ = 1366308.

The previous prime is 2049533. The next prime is 2049547. The reversal of 2049543 is 3459402.

It is not a de Polignac number, because 2049543 - 2⁸ = 2049287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049547) 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 9 ways as a sum of consecutive naturals, for example, 12571 + ... + 12732.

2^2049543 is an apocalyptic number.

2049543 is a deficient number, since it is larger than the sum of its proper divisors (1012241).

2049543 is an equidigital number, since it uses as much as digits as its factorization.

2049543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25315 (or 25306 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2049543 is about 1431.6225061098. The cubic root of 2049543 is about 127.0239688573.

The spelling of 2049543 in words is "two million, forty-nine thousand, five hundred forty-three".