40536921 has 8 divisors (see below), whose sum is σ = 54079744. Its totient is φ = 27009360.

The previous prime is 40536913. The next prime is 40536949. The reversal of 40536921 is 12963504.

40536921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40536921 - 2³ = 40536913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40536901) 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 7 ways as a sum of consecutive naturals, for example, 5976 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (6759968).

Almost surely, 2^40536921 is an apocalyptic number.

It is an amenable number.

40536921 is a deficient number, since it is larger than the sum of its proper divisors (13542823).

40536921 is a wasteful number, since it uses less digits than its factorization.

40536921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 40536921 is about 6366.8611575878. The cubic root of 40536921 is about 343.5185966129.

The spelling of 40536921 in words is "forty million, five hundred thirty-six thousand, nine hundred twenty-one".