43201421 has 4 divisors (see below), whose sum is σ = 45475200. Its totient is φ = 40927644.

The previous prime is 43201391. The next prime is 43201423. The reversal of 43201421 is 12410234.

43201421 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 an emirpimes, since its reverse is a distinct semiprime: 12410234 = 2 ⋅6205117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43201421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43201421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43201423) 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, 1136861 + ... + 1136898.

It is an arithmetic number, because the mean of its divisors is an integer number (11368800).

Almost surely, 2^43201421 is an apocalyptic number.

It is an amenable number.

43201421 is a deficient number, since it is larger than the sum of its proper divisors (2273779).

43201421 is a wasteful number, since it uses less digits than its factorization.

43201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273778.

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

The square root of 43201421 is about 6572.7787883056. The cubic root of 43201421 is about 350.8859757926.

Adding to 43201421 its reverse (12410234), we get a palindrome (55611655).

The spelling of 43201421 in words is "forty-three million, two hundred one thousand, four hundred twenty-one".