2020045 has 4 divisors (see below), whose sum is σ = 2424060. Its totient is φ = 1616032.

The previous prime is 2020043. The next prime is 2020079. The reversal of 2020045 is 5400202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5400202 = 2 ⋅2700101.

It can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 477481 = 1242^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020045 - 2¹ = 2020043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020043) 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 3 ways as a sum of consecutive naturals, for example, 202000 + ... + 202009.

It is an arithmetic number, because the mean of its divisors is an integer number (606015).

2^2020045 is an apocalyptic number.

It is an amenable number.

2020045 is a deficient number, since it is larger than the sum of its proper divisors (404015).

2020045 is an equidigital number, since it uses as much as digits as its factorization.

2020045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404014.

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

The square root of 2020045 is about 1421.2828712118. The cubic root of 2020045 is about 126.4116251726.

Adding to 2020045 its reverse (5400202), we get a palindrome (7420247).

The spelling of 2020045 in words is "two million, twenty thousand, forty-five".