42040430 has 16 divisors (see below), whose sum is σ = 78282720. Its totient is φ = 16236192.

The previous prime is 42040421. The next prime is 42040447. The reversal of 42040430 is 3404024.

42040430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42040399 and 42040408.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 72194 + ... + 72773.

It is an arithmetic number, because the mean of its divisors is an integer number (4892670).

Almost surely, 2^42040430 is an apocalyptic number.

42040430 is a deficient number, since it is larger than the sum of its proper divisors (36242290).

42040430 is a wasteful number, since it uses less digits than its factorization.

42040430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145003.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 42040430 is about 6483.8591903279. The cubic root of 42040430 is about 347.7141650341.

Adding to 42040430 its reverse (3404024), we get a palindrome (45444454).

The spelling of 42040430 in words is "forty-two million, forty thousand, four hundred thirty".