43021045 has 4 divisors (see below), whose sum is σ = 51625260. Its totient is φ = 34416832.

The previous prime is 43021019. The next prime is 43021091. The reversal of 43021045 is 54012034.

43021045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 28451556 + 14569489 = 5334^2 + 3817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43021045 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4302100 + ... + 4302109.

It is an arithmetic number, because the mean of its divisors is an integer number (12906315).

Almost surely, 2^43021045 is an apocalyptic number.

It is an amenable number.

43021045 is a deficient number, since it is larger than the sum of its proper divisors (8604215).

43021045 is an equidigital number, since it uses as much as digits as its factorization.

43021045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604214.

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

The square root of 43021045 is about 6559.0429942180. The cubic root of 43021045 is about 350.3969509901.

Adding to 43021045 its reverse (54012034), we get a palindrome (97033079).

The spelling of 43021045 in words is "forty-three million, twenty-one thousand, forty-five".