404243042 has 12 divisors (see below), whose sum is σ = 705363030. Its totient is φ = 173246976.

The previous prime is 404243041. The next prime is 404243083. The reversal of 404243042 is 240342404.

It can be written as a sum of positive squares in only one way, i.e., 237807241 + 166435801 = 15421^2 + 12901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404242999 and 404243017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404243041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2062367 + ... + 2062562.

Almost surely, 2^404243042 is an apocalyptic number.

404243042 is a deficient number, since it is larger than the sum of its proper divisors (301119988).

404243042 is a wasteful number, since it uses less digits than its factorization.

404243042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124945 (or 4124938 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 404243042 is about 20105.7962289485. The cubic root of 404243042 is about 739.4023918753.

Adding to 404243042 its reverse (240342404), we get a palindrome (644585446).

The spelling of 404243042 in words is "four hundred four million, two hundred forty-three thousand, forty-two".