404135042 has 8 divisors (see below), whose sum is σ = 606401100. Its totient is φ = 202001344.

The previous prime is 404135029. The next prime is 404135057. The reversal of 404135042 is 240531404.

It can be written as a sum of positive squares in 2 ways, for example, as 402363481 + 1771561 = 20059^2 + 1331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 404134999 and 404135017.

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 3 ways as a sum of consecutive naturals, for example, 25067 + ... + 37902.

Almost surely, 2^404135042 is an apocalyptic number.

404135042 is a deficient number, since it is larger than the sum of its proper divisors (202266058).

404135042 is a wasteful number, since it uses less digits than its factorization.

404135042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66180.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 404135042 is about 20103.1102568732. The cubic root of 404135042 is about 739.3365382817.

Adding to 404135042 its reverse (240531404), we get a palindrome (644666446).

The spelling of 404135042 in words is "four hundred four million, one hundred thirty-five thousand, forty-two".