40012871 has 2 divisors, whose sum is σ = 40012872. Its totient is φ = 40012870.

The previous prime is 40012859. The next prime is 40012897. The reversal of 40012871 is 17821004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40012871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40012171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006435 + 20006436.

It is an arithmetic number, because the mean of its divisors is an integer number (20006436).

Almost surely, 2^40012871 is an apocalyptic number.

40012871 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012871 is an equidigital number, since it uses as much as digits as its factorization.

40012871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 40012871 is about 6325.5727803891. The cubic root of 40012871 is about 342.0318672356.

Adding to 40012871 its reverse (17821004), we get a palindrome (57833875).

The spelling of 40012871 in words is "forty million, twelve thousand, eight hundred seventy-one".