2904861 has 8 divisors (see below), whose sum is σ = 3911904. Its totient is φ = 1917200.

The previous prime is 2904857. The next prime is 2904883. The reversal of 2904861 is 1684092.

2904861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2904861 - 2² = 2904857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2904821) 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, 4491 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (488988).

2^2904861 is an apocalyptic number.

It is an amenable number.

2904861 is a deficient number, since it is larger than the sum of its proper divisors (1007043).

2904861 is a wasteful number, since it uses less digits than its factorization.

2904861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9691.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2904861 is about 1704.3652777500. The cubic root of 2904861 is about 142.6839483486.

It can be divided in two parts, 290 and 4861, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 2904861 in words is "two million, nine hundred four thousand, eight hundred sixty-one".