43335421 has 2 divisors, whose sum is σ = 43335422. Its totient is φ = 43335420.

The previous prime is 43335389. The next prime is 43335433. The reversal of 43335421 is 12453334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 236196 = 6565^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 43335421 - 2⁵ = 43335389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43335451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21667710 + 21667711.

It is an arithmetic number, because the mean of its divisors is an integer number (21667711).

Almost surely, 2^43335421 is an apocalyptic number.

It is an amenable number.

43335421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43335421 is an equidigital number, since it uses as much as digits as its factorization.

43335421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 25.

The square root of 43335421 is about 6582.9644538004. The cubic root of 43335421 is about 351.2483881842.

Adding to 43335421 its reverse (12453334), we get a palindrome (55788755).

The spelling of 43335421 in words is "forty-three million, three hundred thirty-five thousand, four hundred twenty-one".