2521804 has 6 divisors (see below), whose sum is σ = 4413164. Its totient is φ = 1260900.

The previous prime is 2521769. The next prime is 2521807. The reversal of 2521804 is 4081252.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (2521807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315222 + ... + 315229.

2^2521804 is an apocalyptic number.

It is an amenable number.

2521804 is a deficient number, since it is larger than the sum of its proper divisors (1891360).

2521804 is a wasteful number, since it uses less digits than its factorization.

2521804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630455 (or 630453 counting only the distinct ones).

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

The square root of 2521804 is about 1588.0188915753. The cubic root of 2521804 is about 136.1143070131.

The spelling of 2521804 in words is "two million, five hundred twenty-one thousand, eight hundred four".