40171121 has 2 divisors, whose sum is σ = 40171122. Its totient is φ = 40171120.

The previous prime is 40171099. The next prime is 40171127. The reversal of 40171121 is 12117104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 17977600 = 4711^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 40171121 - 2⁶ = 40171057 is a prime.

It is a super-2 number, since 2×40171121² = 3227437924793282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40171121.

It is not a weakly prime, because it can be changed into another prime (40171127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20085560 + 20085561.

It is an arithmetic number, because the mean of its divisors is an integer number (20085561).

Almost surely, 2^40171121 is an apocalyptic number.

It is an amenable number.

40171121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40171121 is an equidigital number, since it uses as much as digits as its factorization.

40171121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 40171121 is about 6338.0691854854. The cubic root of 40171121 is about 342.4821835263.

Adding to 40171121 its reverse (12117104), we get a palindrome (52288225).

The spelling of 40171121 in words is "forty million, one hundred seventy-one thousand, one hundred twenty-one".