2581204 has 18 divisors (see below), whose sum is σ = 4637850. Its totient is φ = 1256976.

The previous prime is 2581181. The next prime is 2581211. The reversal of 2581204 is 4021852.

2581204 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., 2396304 + 184900 = 1548^2 + 430^2 .

It is a super-2 number, since 2×2581204² = 13325228179232, which contains 22 as substring.

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 in 5 ways as a sum of consecutive naturals, for example, 7222 + ... + 7570.

2^2581204 is an apocalyptic number.

It is an amenable number.

2581204 is a deficient number, since it is larger than the sum of its proper divisors (2056646).

2581204 is a wasteful number, since it uses less digits than its factorization.

2581204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2581204 is about 1606.6125855352. The cubic root of 2581204 is about 137.1747286624.

The spelling of 2581204 in words is "two million, five hundred eighty-one thousand, two hundred four".