40005271 has 2 divisors, whose sum is σ = 40005272. Its totient is φ = 40005270.

The previous prime is 40005269. The next prime is 40005281. The reversal of 40005271 is 17250004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40005271 - 2¹ = 40005269 is a prime.

Together with 40005269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40005281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002635 + 20002636.

It is an arithmetic number, because the mean of its divisors is an integer number (20002636).

Almost surely, 2^40005271 is an apocalyptic number.

40005271 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005271 is an equidigital number, since it uses as much as digits as its factorization.

40005271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 40005271 is about 6324.9720157484. The cubic root of 40005271 is about 342.0102108142.

Adding to 40005271 its reverse (17250004), we get a palindrome (57255275).

The spelling of 40005271 in words is "forty million, five thousand, two hundred seventy-one".