4542009 has 32 divisors (see below), whose sum is σ = 6894720. Its totient is φ = 2644992.

The previous prime is 4542001. The next prime is 4542011. The reversal of 4542009 is 9002454.

It is not a de Polignac number, because 4542009 - 2³ = 4542001 is a prime.

4542009 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4542009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4542001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54682 + ... + 54764.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^4542009 is an apocalyptic number.

It is an amenable number.

4542009 is a deficient number, since it is larger than the sum of its proper divisors (2352711).

4542009 is a wasteful number, since it uses less digits than its factorization.

4542009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 4542009 is about 2131.1989583331. The cubic root of 4542009 is about 165.6085152218.

The spelling of 4542009 in words is "four million, five hundred forty-two thousand, nine".