4505845 has 4 divisors (see below), whose sum is σ = 5407020. Its totient is φ = 3604672.

The previous prime is 4505807. The next prime is 4505849. The reversal of 4505845 is 5485054.

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 2452356 + 2053489 = 1566^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 4505845 - 2¹¹ = 4503797 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

4505845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4505849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450580 + ... + 450589.

It is an arithmetic number, because the mean of its divisors is an integer number (1351755).

Almost surely, 2^4505845 is an apocalyptic number.

It is an amenable number.

4505845 is a deficient number, since it is larger than the sum of its proper divisors (901175).

4505845 is an equidigital number, since it uses as much as digits as its factorization.

4505845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901174.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 4505845 is about 2122.6975761987. The cubic root of 4505845 is about 165.1678121288.

The spelling of 4505845 in words is "four million, five hundred five thousand, eight hundred forty-five".