2001845 has 8 divisors (see below), whose sum is σ = 2436480. Its totient is φ = 1578640.

The previous prime is 2001833. The next prime is 2001847. The reversal of 2001845 is 5481002.

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

It is a de Polignac number, because none of the positive numbers 2^k-2001845 is a prime.

2001845 is a modest number, since divided by 1845 gives 20 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001847) 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 7 ways as a sum of consecutive naturals, for example, 2465 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (304560).

2^2001845 is an apocalyptic number.

It is an amenable number.

2001845 is a deficient number, since it is larger than the sum of its proper divisors (434635).

2001845 is an equidigital number, since it uses as much as digits as its factorization.

2001845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5715.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2001845 is about 1414.8657180100. The cubic root of 2001845 is about 126.0308356545.

Adding to 2001845 its reverse (5481002), we get a palindrome (7482847).

The spelling of 2001845 in words is "two million, one thousand, eight hundred forty-five".