2504821 has 12 divisors (see below), whose sum is σ = 2791936. Its totient is φ = 2245320.

The previous prime is 2504819. The next prime is 2504837. The reversal of 2504821 is 1284052.

2504821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2504821 - 2¹ = 2504819 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2504792 and 2504801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2504881) 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 11 ways as a sum of consecutive naturals, for example, 15286 + ... + 15448.

2^2504821 is an apocalyptic number.

It is an amenable number.

2504821 is a deficient number, since it is larger than the sum of its proper divisors (287115).

2504821 is a wasteful number, since it uses less digits than its factorization.

2504821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2504821 is about 1582.6626298741. The cubic root of 2504821 is about 135.8080661932.

Adding to 2504821 its reverse (1284052), we get a palindrome (3788873).

The spelling of 2504821 in words is "two million, five hundred four thousand, eight hundred twenty-one".