2604921 has 16 divisors (see below), whose sum is σ = 3817920. Its totient is φ = 1566720.

The previous prime is 2604913. The next prime is 2604949. The reversal of 2604921 is 1294062.

2604921 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 2604921 - 2³ = 2604913 is a prime.

It is a super-2 number, since 2×2604921² = 13571226832482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2604891 and 2604900.

It is not an unprimeable number, because it can be changed into a prime (2604521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6165 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (238620).

2^2604921 is an apocalyptic number.

It is an amenable number.

2604921 is a deficient number, since it is larger than the sum of its proper divisors (1212999).

2604921 is a wasteful number, since it uses less digits than its factorization.

2604921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2604921 is about 1613.9767656320. The cubic root of 2604921 is about 137.5935847751.

Adding to 2604921 its reverse (1294062), we get a palindrome (3898983).

The spelling of 2604921 in words is "two million, six hundred four thousand, nine hundred twenty-one".