40004543 has 4 divisors (see below), whose sum is σ = 41384040. Its totient is φ = 38625048.

The previous prime is 40004533. The next prime is 40004551. The reversal of 40004543 is 34540004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40004543 - 2¹⁰ = 40003519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689705 + ... + 689762.

It is an arithmetic number, because the mean of its divisors is an integer number (10346010).

Almost surely, 2^40004543 is an apocalyptic number.

40004543 is a deficient number, since it is larger than the sum of its proper divisors (1379497).

40004543 is a wasteful number, since it uses less digits than its factorization.

40004543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379496.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40004543 is about 6324.9144658248. The cubic root of 40004543 is about 342.0081362131.

Adding to 40004543 its reverse (34540004), we get a palindrome (74544547).

The spelling of 40004543 in words is "forty million, four thousand, five hundred forty-three".