2045403 has 6 divisors (see below), whose sum is σ = 2954484. Its totient is φ = 1363596.

The previous prime is 2045377. The next prime is 2045437. The reversal of 2045403 is 3045402.

It is a happy number.

It is not a de Polignac number, because 2045403 - 2⁵ = 2045371 is a prime.

2045403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2045503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113625 + ... + 113642.

It is an arithmetic number, because the mean of its divisors is an integer number (492414).

2^2045403 is an apocalyptic number.

2045403 is a deficient number, since it is larger than the sum of its proper divisors (909081).

2045403 is a wasteful number, since it uses less digits than its factorization.

2045403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227273 (or 227270 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 2045403 is about 1430.1758633119. The cubic root of 2045403 is about 126.9383833204.

Subtracting 2045403 from its reverse (3045402), we obtain a palindrome (999999).

The spelling of 2045403 in words is "two million, forty-five thousand, four hundred three".