2045523 has 4 divisors (see below), whose sum is σ = 2727368. Its totient is φ = 1363680.

The previous prime is 2045509. The next prime is 2045539. The reversal of 2045523 is 3255402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2045523 - 2⁹ = 2045011 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 0 + 4³ + 5 + 5⁹ + 2¹⁵ + 3¹⁰ .

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2045523.

It is not an unprimeable number, because it can be changed into a prime (2045503) 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, 340918 + ... + 340923.

It is an arithmetic number, because the mean of its divisors is an integer number (681842).

2^2045523 is an apocalyptic number.

2045523 is a deficient number, since it is larger than the sum of its proper divisors (681845).

2045523 is an equidigital number, since it uses as much as digits as its factorization.

2045523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681844.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 2045523 is about 1430.2178155792. The cubic root of 2045523 is about 126.9408656850.

The spelling of 2045523 in words is "two million, forty-five thousand, five hundred twenty-three".