2004945 has 16 divisors (see below), whose sum is σ = 3253632. Its totient is φ = 1054080.

The previous prime is 2004943. The next prime is 2004953. The reversal of 2004945 is 5494002.

It is not a de Polignac number, because 2004945 - 2¹ = 2004943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2004943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (203352).

2^2004945 is an apocalyptic number.

It is an amenable number.

2004945 is a deficient number, since it is larger than the sum of its proper divisors (1248687).

2004945 is a wasteful number, since it uses less digits than its factorization.

2004945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2004945 is about 1415.9608045423. The cubic root of 2004945 is about 126.0958580198.

Adding to 2004945 its reverse (5494002), we get a palindrome (7498947).

The spelling of 2004945 in words is "two million, four thousand, nine hundred forty-five".