42040043 has 8 divisors (see below), whose sum is σ = 43526208. Its totient is φ = 40578624.

The previous prime is 42040007. The next prime is 42040051. The reversal of 42040043 is 34004024.

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 42040043 - 2¹⁴ = 42023659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42040093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2696 + ... + 9557.

It is an arithmetic number, because the mean of its divisors is an integer number (5440776).

Almost surely, 2^42040043 is an apocalyptic number.

42040043 is a deficient number, since it is larger than the sum of its proper divisors (1486165).

42040043 is a wasteful number, since it uses less digits than its factorization.

42040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12373.

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

The square root of 42040043 is about 6483.8293469215. The cubic root of 42040043 is about 347.7130980786.

Adding to 42040043 its reverse (34004024), we get a palindrome (76044067).

The spelling of 42040043 in words is "forty-two million, forty thousand, forty-three".