2521684 has 24 divisors (see below), whose sum is σ = 4854528. Its totient is φ = 1136640.

The previous prime is 2521681. The next prime is 2521693. The reversal of 2521684 is 4861252.

2521684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521681) 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 7 ways as a sum of consecutive naturals, for example, 9684 + ... + 9940.

It is an arithmetic number, because the mean of its divisors is an integer number (202272).

2^2521684 is an apocalyptic number.

It is an amenable number.

2521684 is a deficient number, since it is larger than the sum of its proper divisors (2332844).

2521684 is a wasteful number, since it uses less digits than its factorization.

2521684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 493 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2521684 is about 1587.9811082000. The cubic root of 2521684 is about 136.1121479798.

It can be divided in two parts, 252 and 1684, that added together give a square (1936 = 44²).

The spelling of 2521684 in words is "two million, five hundred twenty-one thousand, six hundred eighty-four".