4542209 has 4 divisors (see below), whose sum is σ = 5191104. Its totient is φ = 3893316.

The previous prime is 4542203. The next prime is 4542211. The reversal of 4542209 is 9022454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4542209 - 2¹² = 4538113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4542203) 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, 324437 + ... + 324450.

It is an arithmetic number, because the mean of its divisors is an integer number (1297776).

Almost surely, 2^4542209 is an apocalyptic number.

It is an amenable number.

4542209 is a deficient number, since it is larger than the sum of its proper divisors (648895).

4542209 is an equidigital number, since it uses as much as digits as its factorization.

4542209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648894.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4542209 is about 2131.2458797614. The cubic root of 4542209 is about 165.6109459536.

The spelling of 4542209 in words is "four million, five hundred forty-two thousand, two hundred nine".