4540509 has 16 divisors (see below), whose sum is σ = 6767040. Its totient is φ = 3008880.

The previous prime is 4540507. The next prime is 4540517. The reversal of 4540509 is 9050454.

It is not a de Polignac number, because 4540509 - 2¹ = 4540507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5299 + ... + 6095.

It is an arithmetic number, because the mean of its divisors is an integer number (422940).

Almost surely, 2^4540509 is an apocalyptic number.

It is an amenable number.

4540509 is a deficient number, since it is larger than the sum of its proper divisors (2226531).

4540509 is a wasteful number, since it uses less digits than its factorization.

4540509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4540509 is about 2130.8470146869. The cubic root of 4540509 is about 165.5902824586.

The spelling of 4540509 in words is "four million, five hundred forty thousand, five hundred nine".