4320145 has 4 divisors (see below), whose sum is σ = 5184180. Its totient is φ = 3456112.

The previous prime is 4320119. The next prime is 4320187. The reversal of 4320145 is 5410234.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3013696 + 1306449 = 1736^2 + 1143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4320145 is a prime.

It is an Ulam number.

4320145 is a lucky number.

It is an unprimeable number.

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, 432010 + ... + 432019.

It is an arithmetic number, because the mean of its divisors is an integer number (1296045).

Almost surely, 2^4320145 is an apocalyptic number.

It is an amenable number.

4320145 is a deficient number, since it is larger than the sum of its proper divisors (864035).

4320145 is an equidigital number, since it uses as much as digits as its factorization.

4320145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864034.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4320145 is about 2078.4958503687. The cubic root of 4320145 is about 162.8668791538.

Adding to 4320145 its reverse (5410234), we get a palindrome (9730379).

It can be divided in two parts, 4320 and 145, that added together give a triangular number (4465 = T₉₄).

The spelling of 4320145 in words is "four million, three hundred twenty thousand, one hundred forty-five".