4320605 has 4 divisors (see below), whose sum is σ = 5184732. Its totient is φ = 3456480.

The previous prime is 4320593. The next prime is 4320607. The reversal of 4320605 is 5060234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5060234 = 2 ⋅2530117.

It can be written as a sum of positive squares in 2 ways, for example, as 2775556 + 1545049 = 1666^2 + 1243^2 .

It is not a de Polignac number, because 4320605 - 2²⁰ = 3272029 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 (4320607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432056 + ... + 432065.

It is an arithmetic number, because the mean of its divisors is an integer number (1296183).

Almost surely, 2^4320605 is an apocalyptic number.

It is an amenable number.

4320605 is a deficient number, since it is larger than the sum of its proper divisors (864127).

4320605 is an equidigital number, since it uses as much as digits as its factorization.

4320605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864126.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 4320605 is about 2078.6065043678. The cubic root of 4320605 is about 162.8726595235.

Adding to 4320605 its reverse (5060234), we get a palindrome (9380839).

The spelling of 4320605 in words is "four million, three hundred twenty thousand, six hundred five".