43241021 has 4 divisors (see below), whose sum is σ = 43409532. Its totient is φ = 43072512.

The previous prime is 43240999. The next prime is 43241027. The reversal of 43241021 is 12014234.

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 30360100 + 12880921 = 5510^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 43241021 - 2¹⁸ = 42978877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43241027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83870 + ... + 84383.

It is an arithmetic number, because the mean of its divisors is an integer number (10852383).

Almost surely, 2^43241021 is an apocalyptic number.

It is an amenable number.

43241021 is a deficient number, since it is larger than the sum of its proper divisors (168511).

43241021 is a wasteful number, since it uses less digits than its factorization.

43241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168510.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 43241021 is about 6575.7905228193. The cubic root of 43241021 is about 350.9931546840.

Adding to 43241021 its reverse (12014234), we get a palindrome (55255255).

The spelling of 43241021 in words is "forty-three million, two hundred forty-one thousand, twenty-one".