4501609 has 4 divisors (see below), whose sum is σ = 5144704. Its totient is φ = 3858516.

The previous prime is 4501577. The next prime is 4501619. The reversal of 4501609 is 9061054.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9061054 = 2 ⋅4530527.

It is a cyclic number.

It is not a de Polignac number, because 4501609 - 2⁵ = 4501577 is a prime.

It is a Duffinian number.

4501609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4501619) 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, 321537 + ... + 321550.

It is an arithmetic number, because the mean of its divisors is an integer number (1286176).

Almost surely, 2^4501609 is an apocalyptic number.

It is an amenable number.

4501609 is a deficient number, since it is larger than the sum of its proper divisors (643095).

4501609 is an equidigital number, since it uses as much as digits as its factorization.

4501609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643094.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 4501609 is about 2121.6995546024. The cubic root of 4501609 is about 165.1160371405.

The spelling of 4501609 in words is "four million, five hundred one thousand, six hundred nine".