2004745 has 4 divisors (see below), whose sum is σ = 2405700. Its totient is φ = 1603792.

The previous prime is 2004731. The next prime is 2004757. The reversal of 2004745 is 5474002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 1610361 = 628^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 2004745 - 2⁵ = 2004713 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 200470 + ... + 200479.

It is an arithmetic number, because the mean of its divisors is an integer number (601425).

2^2004745 is an apocalyptic number.

It is an amenable number.

2004745 is a deficient number, since it is larger than the sum of its proper divisors (400955).

2004745 is an equidigital number, since it uses as much as digits as its factorization.

2004745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400954.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2004745 is about 1415.8901793571. The cubic root of 2004745 is about 126.0916650519.

Adding to 2004745 its reverse (5474002), we get a palindrome (7478747).

The spelling of 2004745 in words is "two million, four thousand, seven hundred forty-five".