4540309 has 8 divisors (see below), whose sum is σ = 4826520. Its totient is φ = 4256256.

The previous prime is 4540303. The next prime is 4540313. The reversal of 4540309 is 9030454.

It can be written as a sum of positive squares in 4 ways, for example, as 1633284 + 2907025 = 1278^2 + 1705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4540309 - 2⁷ = 4540181 is a prime.

It is a super-2 number, since 2×4540309² = 41228811630962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540303) 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 7 ways as a sum of consecutive naturals, for example, 6627 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (603315).

Almost surely, 2^4540309 is an apocalyptic number.

It is an amenable number.

4540309 is a deficient number, since it is larger than the sum of its proper divisors (286211).

4540309 is a wasteful number, since it uses less digits than its factorization.

4540309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 4540309 is about 2130.8000844753. The cubic root of 4540309 is about 165.5878511201.

The spelling of 4540309 in words is "four million, five hundred forty thousand, three hundred nine".