2543949 has 6 divisors (see below), whose sum is σ = 3674606. Its totient is φ = 1695960.

The previous prime is 2543939. The next prime is 2543963. The reversal of 2543949 is 9493452.

2543949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 338724 = 1485^2 + 582^2 .

It is not a de Polignac number, because 2543949 - 2⁵ = 2543917 is a prime.

It is a Duffinian number.

2543949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543939) 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 5 ways as a sum of consecutive naturals, for example, 141322 + ... + 141339.

2^2543949 is an apocalyptic number.

It is an amenable number.

2543949 is a deficient number, since it is larger than the sum of its proper divisors (1130657).

2543949 is a wasteful number, since it uses less digits than its factorization.

2543949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282667 (or 282664 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 2543949 is about 1594.9761753707. The cubic root of 2543949 is about 136.5115716954.

The spelling of 2543949 in words is "two million, five hundred forty-three thousand, nine hundred forty-nine".