43420401 has 32 divisors (see below), whose sum is σ = 66326400. Its totient is φ = 28062720.

The previous prime is 43420393. The next prime is 43420423. The reversal of 43420401 is 10402434.

43420401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43420401 - 2³ = 43420393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43420451) 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 31 ways as a sum of consecutive naturals, for example, 154381 + ... + 154661.

It is an arithmetic number, because the mean of its divisors is an integer number (2072700).

Almost surely, 2^43420401 is an apocalyptic number.

It is an amenable number.

43420401 is a deficient number, since it is larger than the sum of its proper divisors (22905999).

43420401 is a wasteful number, since it uses less digits than its factorization.

43420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 43420401 is about 6589.4158314679. The cubic root of 43420401 is about 351.4778355769.

Adding to 43420401 its reverse (10402434), we get a palindrome (53822835).

The spelling of 43420401 in words is "forty-three million, four hundred twenty thousand, four hundred one".