2504221 has 4 divisors (see below), whose sum is σ = 2536000. Its totient is φ = 2472444.

The previous prime is 2504213. The next prime is 2504251. The reversal of 2504221 is 1224052.

2504221 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2504221 - 2³ = 2504213 is a prime.

It is a super-2 number, since 2×2504221² = 12542245633682, which contains 22 as substring.

It is a Duffinian number.

2504221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2504195 and 2504204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2504251) 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, 15771 + ... + 15928.

It is an arithmetic number, because the mean of its divisors is an integer number (634000).

2^2504221 is an apocalyptic number.

It is an amenable number.

2504221 is a deficient number, since it is larger than the sum of its proper divisors (31779).

2504221 is an equidigital number, since it uses as much as digits as its factorization.

2504221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31778.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2504221 is about 1582.4730645417. The cubic root of 2504221 is about 135.7972215930.

Adding to 2504221 its reverse (1224052), we get a palindrome (3728273).

The spelling of 2504221 in words is "two million, five hundred four thousand, two hundred twenty-one".