404425042 has 16 divisors (see below), whose sum is σ = 694111680. Its totient is φ = 173122128.

The previous prime is 404425009. The next prime is 404425057. The reversal of 404425042 is 240524404.

It is a happy number.

It is a super-2 number, since 2×404425042² = 327119229193403528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404424998 and 404425016.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4192 + ... + 28747.

It is an arithmetic number, because the mean of its divisors is an integer number (43381980).

Almost surely, 2^404425042 is an apocalyptic number.

404425042 is a deficient number, since it is larger than the sum of its proper divisors (289686638).

404425042 is a wasteful number, since it uses less digits than its factorization.

404425042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33825.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 404425042 is about 20110.3217776345. The cubic root of 404425042 is about 739.5133408430.

Adding to 404425042 its reverse (240524404), we get a palindrome (644949446).

The spelling of 404425042 in words is "four hundred four million, four hundred twenty-five thousand, forty-two".