2904921 has 6 divisors (see below), whose sum is σ = 4196010. Its totient is φ = 1936608.

The previous prime is 2904893. The next prime is 2904947. The reversal of 2904921 is 1294092.

2904921 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., 1550025 + 1354896 = 1245^2 + 1164^2 .

It is not a de Polignac number, because 2904921 - 2⁶ = 2904857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2904221) 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 5 ways as a sum of consecutive naturals, for example, 161376 + ... + 161393.

It is an arithmetic number, because the mean of its divisors is an integer number (699335).

2^2904921 is an apocalyptic number.

It is an amenable number.

2904921 is a deficient number, since it is larger than the sum of its proper divisors (1291089).

2904921 is a wasteful number, since it uses less digits than its factorization.

2904921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322775 (or 322772 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2904921 is about 1704.3828795197. The cubic root of 2904921 is about 142.6849307224.

The spelling of 2904921 in words is "two million, nine hundred four thousand, nine hundred twenty-one".