40905071 has 2 divisors, whose sum is σ = 40905072. Its totient is φ = 40905070.

The previous prime is 40905061. The next prime is 40905097. The reversal of 40905071 is 17050904.

40905071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (40905097) can be obtained adding 40905071 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40905071 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40905071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40905001) 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, 20452535 + 20452536.

It is an arithmetic number, because the mean of its divisors is an integer number (20452536).

Almost surely, 2^40905071 is an apocalyptic number.

40905071 is a deficient number, since it is larger than the sum of its proper divisors (1).

40905071 is an equidigital number, since it uses as much as digits as its factorization.

40905071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 40905071 is about 6395.7072321988. The cubic root of 40905071 is about 344.5553917039. Note that the first 3 decimals are identical.

Adding to 40905071 its reverse (17050904), we get a palindrome (57955975).

The spelling of 40905071 in words is "forty million, nine hundred five thousand, seventy-one".