43042321 has 8 divisors (see below), whose sum is σ = 49353920. Its totient is φ = 36771408.

The previous prime is 43042313. The next prime is 43042327. The reversal of 43042321 is 12324034.

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

It is a cyclic number.

It is not a de Polignac number, because 43042321 - 2³ = 43042313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43042327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7866 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (6169240).

Almost surely, 2^43042321 is an apocalyptic number.

It is an amenable number.

43042321 is a deficient number, since it is larger than the sum of its proper divisors (6311599).

43042321 is a wasteful number, since it uses less digits than its factorization.

43042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43042321 is about 6560.6646766924. The cubic root of 43042321 is about 350.4547042510.

Adding to 43042321 its reverse (12324034), we get a palindrome (55366355).

The spelling of 43042321 in words is "forty-three million, forty-two thousand, three hundred twenty-one".