43004042 has 24 divisors (see below), whose sum is σ = 68488740. Its totient is φ = 20227200.

The previous prime is 43004029. The next prime is 43004047. The reversal of 43004042 is 24040034.

It can be written as a sum of positive squares in 2 ways, for example, as 37810201 + 5193841 = 6149^2 + 2279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43004042.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43004047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107042 + ... + 107442.

Almost surely, 2^43004042 is an apocalyptic number.

43004042 is a deficient number, since it is larger than the sum of its proper divisors (25484698).

43004042 is a wasteful number, since it uses less digits than its factorization.

43004042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 475 counting only the distinct ones).

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

The square root of 43004042 is about 6557.7467166703. The cubic root of 43004042 is about 350.3507830087.

Adding to 43004042 its reverse (24040034), we get a palindrome (67044076).

The spelling of 43004042 in words is "forty-three million, four thousand, forty-two".