2001045 has 8 divisors (see below), whose sum is σ = 3201696. Its totient is φ = 1067216.

The previous prime is 2001037. The next prime is 2001049. The reversal of 2001045 is 5401002.

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 2001045 - 2³ = 2001037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66687 + ... + 66716.

It is an arithmetic number, because the mean of its divisors is an integer number (400212).

2^2001045 is an apocalyptic number.

It is an amenable number.

2001045 is a deficient number, since it is larger than the sum of its proper divisors (1200651).

2001045 is a wasteful number, since it uses less digits than its factorization.

2001045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133411.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2001045 is about 1414.5829774177. The cubic root of 2001045 is about 126.0140447937.

Adding to 2001045 its reverse (5401002), we get a palindrome (7402047).

The spelling of 2001045 in words is "two million, one thousand, forty-five".