43420565 has 8 divisors (see below), whose sum is σ = 52161408. Its totient is φ = 34698640.

The previous prime is 43420543. The next prime is 43420579. The reversal of 43420565 is 56502434.

43420565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43420565 - 2¹⁴ = 43404181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 944 + ... + 9366.

It is an arithmetic number, because the mean of its divisors is an integer number (6520176).

Almost surely, 2^43420565 is an apocalyptic number.

It is an amenable number.

43420565 is a deficient number, since it is larger than the sum of its proper divisors (8740843).

43420565 is a wasteful number, since it uses less digits than its factorization.

43420565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9459.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 43420565 is about 6589.4282756549. The cubic root of 43420565 is about 351.4782780900.

Adding to 43420565 its reverse (56502434), we get a palindrome (99922999).

The spelling of 43420565 in words is "forty-three million, four hundred twenty thousand, five hundred sixty-five".