42000043 has 8 divisors (see below), whose sum is σ = 42549248. Its totient is φ = 41454504.

The previous prime is 42000037. The next prime is 42000059. The reversal of 42000043 is 34000024.

42000043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42000043 - 2⁵ = 42000011 is a prime.

It is a super-2 number, since 2×42000043² = 3528007224003698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41999987 and 42000032.

It is not an unprimeable number, because it can be changed into a prime (42000073) by changing a digit.

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, 27580 + ... + 29062.

It is an arithmetic number, because the mean of its divisors is an integer number (5318656).

Almost surely, 2^42000043 is an apocalyptic number.

42000043 is a deficient number, since it is larger than the sum of its proper divisors (549205).

42000043 is a wasteful number, since it uses less digits than its factorization.

42000043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 42000043 is about 6480.7440159290. The cubic root of 42000043 is about 347.6027831149.

Adding to 42000043 its reverse (34000024), we get a palindrome (76000067).

The spelling of 42000043 in words is "forty-two million, forty-three", and thus it is an aban number and an uban number.