2520404 has 6 divisors (see below), whose sum is σ = 4410714. Its totient is φ = 1260200.

The previous prime is 2520383. The next prime is 2520431. The reversal of 2520404 is 4040252.

2520404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 300304 = 1490^2 + 548^2 .

2520404 is a modest number, since divided by 404 gives 252 as remainder.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 315047 + ... + 315054.

It is an arithmetic number, because the mean of its divisors is an integer number (735119).

2^2520404 is an apocalyptic number.

It is an amenable number.

2520404 is a deficient number, since it is larger than the sum of its proper divisors (1890310).

2520404 is a wasteful number, since it uses less digits than its factorization.

2520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630105 (or 630103 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 2520404 is about 1587.5780295784. The cubic root of 2520404 is about 136.0891140289.

Adding to 2520404 its reverse (4040252), we get a palindrome (6560656).

The spelling of 2520404 in words is "two million, five hundred twenty thousand, four hundred four".