4520999 has 4 divisors (see below), whose sum is σ = 5166864. Its totient is φ = 3875136.

The previous prime is 4520983. The next prime is 4521001. The reversal of 4520999 is 9990254.

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

It is a cyclic number.

It is not a de Polignac number, because 4520999 - 2⁴ = 4520983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4520909) 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, 322922 + ... + 322935.

It is an arithmetic number, because the mean of its divisors is an integer number (1291716).

Almost surely, 2^4520999 is an apocalyptic number.

4520999 is a deficient number, since it is larger than the sum of its proper divisors (645865).

4520999 is an equidigital number, since it uses as much as digits as its factorization.

4520999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645864.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 4520999 is about 2126.2640946035. The cubic root of 4520999 is about 165.3527683572.

The spelling of 4520999 in words is "four million, five hundred twenty thousand, nine hundred ninety-nine".