43420001 has 4 divisors (see below), whose sum is σ = 43850004. Its totient is φ = 42990000.

The previous prime is 43419977. The next prime is 43420007. The reversal of 43420001 is 10002434.

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 36784225 + 6635776 = 6065^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 43420001 - 2¹⁸ = 43157857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43420007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214850 + ... + 215051.

It is an arithmetic number, because the mean of its divisors is an integer number (10962501).

Almost surely, 2^43420001 is an apocalyptic number.

It is an amenable number.

43420001 is a deficient number, since it is larger than the sum of its proper divisors (430003).

43420001 is a wasteful number, since it uses less digits than its factorization.

43420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430002.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 43420001 is about 6589.3854796938. The cubic root of 43420001 is about 351.4767562719.

Adding to 43420001 its reverse (10002434), we get a palindrome (53422435).

The spelling of 43420001 in words is "forty-three million, four hundred twenty thousand, one".