40521005 has 16 divisors (see below), whose sum is σ = 55710720. Its totient is φ = 27716352.

The previous prime is 40520993. The next prime is 40521011. The reversal of 40521005 is 50012504.

40521005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40521005 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15557 + ... + 17973.

It is an arithmetic number, because the mean of its divisors is an integer number (3481920).

Almost surely, 2^40521005 is an apocalyptic number.

It is an amenable number.

40521005 is a deficient number, since it is larger than the sum of its proper divisors (15189715).

40521005 is a wasteful number, since it uses less digits than its factorization.

40521005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 40521005 is about 6365.6111254144. The cubic root of 40521005 is about 343.4736321907.

Adding to 40521005 its reverse (50012504), we get a palindrome (90533509).

The spelling of 40521005 in words is "forty million, five hundred twenty-one thousand, five".