4520905 has 4 divisors (see below), whose sum is σ = 5425092. Its totient is φ = 3616720.

The previous prime is 4520881. The next prime is 4520909. The reversal of 4520905 is 5090254.

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 3455881 + 1065024 = 1859^2 + 1032^2 .

It is not a de Polignac number, because 4520905 - 2⁹ = 4520393 is a prime.

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 4520905.

It is not an unprimeable number, because it can be changed into a prime (4520909) 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, 452086 + ... + 452095.

It is an arithmetic number, because the mean of its divisors is an integer number (1356273).

Almost surely, 2^4520905 is an apocalyptic number.

It is an amenable number.

4520905 is a deficient number, since it is larger than the sum of its proper divisors (904187).

4520905 is an equidigital number, since it uses as much as digits as its factorization.

4520905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904186.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 4520905 is about 2126.2419899908. The cubic root of 4520905 is about 165.3516223517.

The spelling of 4520905 in words is "four million, five hundred twenty thousand, nine hundred five".