40252109 has 2 divisors, whose sum is σ = 40252110. Its totient is φ = 40252108.

The previous prime is 40252081. The next prime is 40252123. The reversal of 40252109 is 90125204.

40252109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 4515625 = 5978^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 40252109 - 2⁸ = 40251853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40252129) 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 as a sum of consecutive naturals, namely, 20126054 + 20126055.

It is an arithmetic number, because the mean of its divisors is an integer number (20126055).

Almost surely, 2^40252109 is an apocalyptic number.

It is an amenable number.

40252109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40252109 is an equidigital number, since it uses as much as digits as its factorization.

40252109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40252109 is about 6344.4549805322. The cubic root of 40252109 is about 342.7121856382.

The spelling of 40252109 in words is "forty million, two hundred fifty-two thousand, one hundred nine".