43342421 has 4 divisors (see below), whose sum is σ = 43355712. Its totient is φ = 43329132.

The previous prime is 43342417. The next prime is 43342457. The reversal of 43342421 is 12424334.

43342421 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 43342421 - 2² = 43342417 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43342121) by changing a digit.

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, 1970 + ... + 9516.

It is an arithmetic number, because the mean of its divisors is an integer number (10838928).

Almost surely, 2^43342421 is an apocalyptic number.

It is an amenable number.

43342421 is a deficient number, since it is larger than the sum of its proper divisors (13291).

43342421 is an equidigital number, since it uses as much as digits as its factorization.

43342421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13290.

The product of its digits is 2304, while the sum is 23.

The square root of 43342421 is about 6583.4961076923. The cubic root of 43342421 is about 351.2672996296.

Adding to 43342421 its reverse (12424334), we get a palindrome (55766755).

The spelling of 43342421 in words is "forty-three million, three hundred forty-two thousand, four hundred twenty-one".