40521043 has 4 divisors (see below), whose sum is σ = 40665528. Its totient is φ = 40376560.

The previous prime is 40521037. The next prime is 40521109. The reversal of 40521043 is 34012504.

40521043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40521043 - 2⁵ = 40521011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40521043.

It is not an unprimeable number, because it can be changed into a prime (40521443) 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 3 ways as a sum of consecutive naturals, for example, 71821 + ... + 72382.

It is an arithmetic number, because the mean of its divisors is an integer number (10166382).

Almost surely, 2^40521043 is an apocalyptic number.

40521043 is a deficient number, since it is larger than the sum of its proper divisors (144485).

40521043 is a wasteful number, since it uses less digits than its factorization.

40521043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144484.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40521043 is about 6365.6141102018. The cubic root of 40521043 is about 343.4737395588.

Adding to 40521043 its reverse (34012504), we get a palindrome (74533547).

The spelling of 40521043 in words is "forty million, five hundred twenty-one thousand, forty-three".