2504021 has 4 divisors (see below), whose sum is σ = 2696652. Its totient is φ = 2311392.

The previous prime is 2504011. The next prime is 2504069. The reversal of 2504021 is 1204052.

2504021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1030225 + 1473796 = 1015^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504021 - 2¹⁴ = 2487637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2503987 and 2504005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2504011) 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 3 ways as a sum of consecutive naturals, for example, 96296 + ... + 96321.

It is an arithmetic number, because the mean of its divisors is an integer number (674163).

2^2504021 is an apocalyptic number.

It is an amenable number.

2504021 is a deficient number, since it is larger than the sum of its proper divisors (192631).

2504021 is a wasteful number, since it uses less digits than its factorization.

2504021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192630.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2504021 is about 1582.4098710511. The cubic root of 2504021 is about 135.7936063413.

Adding to 2504021 its reverse (1204052), we get a palindrome (3708073).

The spelling of 2504021 in words is "two million, five hundred four thousand, twenty-one".