42120404 has 12 divisors (see below), whose sum is σ = 74020800. Its totient is φ = 20971608.

The previous prime is 42120391. The next prime is 42120409. The reversal of 42120404 is 40402124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42120409) by changing a digit.

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, 21074 + ... + 22985.

It is an arithmetic number, because the mean of its divisors is an integer number (6168400).

Almost surely, 2^42120404 is an apocalyptic number.

It is an amenable number.

42120404 is a deficient number, since it is larger than the sum of its proper divisors (31900396).

42120404 is a wasteful number, since it uses less digits than its factorization.

42120404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44302 (or 44300 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42120404 is about 6490.0234206049. The cubic root of 42120404 is about 347.9345122730.

Adding to 42120404 its reverse (40402124), we get a palindrome (82522528).

It can be divided in two parts, 42120 and 404, that added together give a palindrome (42524).

The spelling of 42120404 in words is "forty-two million, one hundred twenty thousand, four hundred four".