42440401 has 2 divisors, whose sum is σ = 42440402. Its totient is φ = 42440400.

The previous prime is 42440393. The next prime is 42440423. The reversal of 42440401 is 10404424.

42440401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 4309776 = 6175^2 + 2076^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440401 - 2³ = 42440393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42420401) 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 as a sum of consecutive naturals, namely, 21220200 + 21220201.

It is an arithmetic number, because the mean of its divisors is an integer number (21220201).

Almost surely, 2^42440401 is an apocalyptic number.

It is an amenable number.

42440401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440401 is an equidigital number, since it uses as much as digits as its factorization.

42440401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42440401 is about 6514.6297669169. The cubic root of 42440401 is about 348.8133993157.

Adding to 42440401 its reverse (10404424), we get a palindrome (52844825).

The spelling of 42440401 in words is "forty-two million, four hundred forty thousand, four hundred one".