2002045 has 4 divisors (see below), whose sum is σ = 2402460. Its totient is φ = 1601632.

The previous prime is 2002019. The next prime is 2002061. The reversal of 2002045 is 5402002.

It is a happy number.

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 822649 + 1179396 = 907^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002045 - 2⁹ = 2001533 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 200200 + ... + 200209.

It is an arithmetic number, because the mean of its divisors is an integer number (600615).

2^2002045 is an apocalyptic number.

It is an amenable number.

2002045 is a deficient number, since it is larger than the sum of its proper divisors (400415).

2002045 is an equidigital number, since it uses as much as digits as its factorization.

2002045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400414.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 2002045 is about 1414.9363943301. The cubic root of 2002045 is about 126.0350326707.

Adding to 2002045 its reverse (5402002), we get a palindrome (7404047).

The spelling of 2002045 in words is "two million, two thousand, forty-five".