404111042 has 4 divisors (see below), whose sum is σ = 606166566. Its totient is φ = 202055520.

The previous prime is 404111041. The next prime is 404111051. The reversal of 404111042 is 240111404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 353402401 + 50708641 = 18799^2 + 7121^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404111042.

It is not an unprimeable number, because it can be changed into a prime (404111041) 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, 101027759 + ... + 101027762.

Almost surely, 2^404111042 is an apocalyptic number.

404111042 is a deficient number, since it is larger than the sum of its proper divisors (202055524).

404111042 is a wasteful number, since it uses less digits than its factorization.

404111042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202055523.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 404111042 is about 20102.5133254526. The cubic root of 404111042 is about 739.3219025566.

Adding to 404111042 its reverse (240111404), we get a palindrome (644222446).

The spelling of 404111042 in words is "four hundred four million, one hundred eleven thousand, forty-two".