40575921 has 4 divisors (see below), whose sum is σ = 54101232. Its totient is φ = 27050612.

The previous prime is 40575917. The next prime is 40575929. The reversal of 40575921 is 12957504.

40575921 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40575921 - 2² = 40575917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40575929) 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, 6762651 + ... + 6762656.

It is an arithmetic number, because the mean of its divisors is an integer number (13525308).

Almost surely, 2^40575921 is an apocalyptic number.

It is an amenable number.

40575921 is a deficient number, since it is larger than the sum of its proper divisors (13525311).

40575921 is a wasteful number, since it uses less digits than its factorization.

40575921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13525310.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 40575921 is about 6369.9231549525. The cubic root of 40575921 is about 343.6287261015.

The spelling of 40575921 in words is "forty million, five hundred seventy-five thousand, nine hundred twenty-one".