2604021 has 8 divisors (see below), whose sum is σ = 3968064. Its totient is φ = 1488000.

The previous prime is 2604013. The next prime is 2604053. The reversal of 2604021 is 1204062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2604021 - 2³ = 2604013 is a prime.

It is a Curzon number.

2604021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61980 + ... + 62021.

It is an arithmetic number, because the mean of its divisors is an integer number (496008).

2^2604021 is an apocalyptic number.

2604021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2604021 is a deficient number, since it is larger than the sum of its proper divisors (1364043).

2604021 is a wasteful number, since it uses less digits than its factorization.

2604021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124011.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2604021 is about 1613.6979271227. The cubic root of 2604021 is about 137.5777367589.

Adding to 2604021 its reverse (1204062), we get a palindrome (3808083).

The spelling of 2604021 in words is "two million, six hundred four thousand, twenty-one".