4320523 has 4 divisors (see below), whose sum is σ = 4344840. Its totient is φ = 4296208.

The previous prime is 4320521. The next prime is 4320529. The reversal of 4320523 is 3250234.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4320523 - 2¹ = 4320521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4320523.

It is not an unprimeable number, because it can be changed into a prime (4320521) 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 3 ways as a sum of consecutive naturals, for example, 11890 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (1086210).

Almost surely, 2^4320523 is an apocalyptic number.

4320523 is a deficient number, since it is larger than the sum of its proper divisors (24317).

4320523 is a wasteful number, since it uses less digits than its factorization.

4320523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24316.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 4320523 is about 2078.5867795211. The cubic root of 4320523 is about 162.8716291398.

Adding to 4320523 its reverse (3250234), we get a palindrome (7570757).

The spelling of 4320523 in words is "four million, three hundred twenty thousand, five hundred twenty-three".