404042071 has 2 divisors, whose sum is σ = 404042072. Its totient is φ = 404042070.

The previous prime is 404042069. The next prime is 404042113. The reversal of 404042071 is 170240404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404042071 - 2¹ = 404042069 is a prime.

Together with 404042069, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404042021) 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, 202021035 + 202021036.

It is an arithmetic number, because the mean of its divisors is an integer number (202021036).

Almost surely, 2^404042071 is an apocalyptic number.

404042071 is a deficient number, since it is larger than the sum of its proper divisors (1).

404042071 is an equidigital number, since it uses as much as digits as its factorization.

404042071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 404042071 is about 20100.7977702379. The cubic root of 404042071 is about 739.2798393059.

Adding to 404042071 its reverse (170240404), we get a palindrome (574282475).

The spelling of 404042071 in words is "four hundred four million, forty-two thousand, seventy-one".