2045090 has 8 divisors (see below), whose sum is σ = 3681180. Its totient is φ = 818032.

The previous prime is 2045089. The next prime is 2045093. The reversal of 2045090 is 905402.

It can be written as a sum of positive squares in 2 ways, for example, as 1771561 + 273529 = 1331^2 + 523^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2045093) by changing a digit.

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, 102245 + ... + 102264.

2^2045090 is an apocalyptic number.

2045090 is a deficient number, since it is larger than the sum of its proper divisors (1636090).

2045090 is a wasteful number, since it uses less digits than its factorization.

2045090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204516.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2045090 is about 1430.0664320234. The cubic root of 2045090 is about 126.9319080291.

The spelling of 2045090 in words is "two million, forty-five thousand, ninety".