4320405 has 16 divisors (see below), whose sum is σ = 7680960. Its totient is φ = 2304144.

The previous prime is 4320383. The next prime is 4320419. The reversal of 4320405 is 5040234.

It is a happy number.

It is not a de Polignac number, because 4320405 - 2⁵ = 4320373 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 15867 + ... + 16136.

It is an arithmetic number, because the mean of its divisors is an integer number (480060).

Almost surely, 2^4320405 is an apocalyptic number.

4320405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4320405 is a deficient number, since it is larger than the sum of its proper divisors (3360555).

4320405 is a wasteful number, since it uses less digits than its factorization.

4320405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32017 (or 32011 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4320405 is about 2078.5583946572. The cubic root of 4320405 is about 162.8701463697.

Adding to 4320405 its reverse (5040234), we get a palindrome (9360639).

The spelling of 4320405 in words is "four million, three hundred twenty thousand, four hundred five".