40871081 has 2 divisors, whose sum is σ = 40871082. Its totient is φ = 40871080.

The previous prime is 40871029. The next prime is 40871087. The reversal of 40871081 is 18017804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30250000 + 10621081 = 5500^2 + 3259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40871081 is a prime.

It is a super-2 number, since 2×40871081² = 3340890524217122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_2483480 and since 40871081 and 2483480 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40871087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20435540 + 20435541.

It is an arithmetic number, because the mean of its divisors is an integer number (20435541).

Almost surely, 2^40871081 is an apocalyptic number.

It is an amenable number.

40871081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40871081 is an equidigital number, since it uses as much as digits as its factorization.

40871081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 40871081 is about 6393.0494288720. The cubic root of 40871081 is about 344.4599293497.

Adding to 40871081 its reverse (18017804), we get a palindrome (58888885).

The spelling of 40871081 in words is "forty million, eight hundred seventy-one thousand, eighty-one".