2544921 has 6 divisors (see below), whose sum is σ = 3676010. Its totient is φ = 1696608.

The previous prime is 2544907. The next prime is 2544923. The reversal of 2544921 is 1294452.

2544921 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., 2368521 + 176400 = 1539^2 + 420^2 .

It is not a de Polignac number, because 2544921 - 2⁷ = 2544793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2544923) 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, 141376 + ... + 141393.

2^2544921 is an apocalyptic number.

It is an amenable number.

2544921 is a deficient number, since it is larger than the sum of its proper divisors (1131089).

2544921 is a wasteful number, since it uses less digits than its factorization.

2544921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282775 (or 282772 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2544921 is about 1595.2808530162. The cubic root of 2544921 is about 136.5289557378.

The spelling of 2544921 in words is "two million, five hundred forty-four thousand, nine hundred twenty-one".