40242113 has 2 divisors, whose sum is σ = 40242114. Its totient is φ = 40242112.

The previous prime is 40242079. The next prime is 40242119. The reversal of 40242113 is 31124204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 8464 = 6343^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 40242113 - 2¹⁸ = 39979969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40242091 and 40242100.

It is not a weakly prime, because it can be changed into another prime (40242119) 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, 20121056 + 20121057.

It is an arithmetic number, because the mean of its divisors is an integer number (20121057).

Almost surely, 2^40242113 is an apocalyptic number.

It is an amenable number.

40242113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242113 is an equidigital number, since it uses as much as digits as its factorization.

40242113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40242113 is about 6343.6671570945. The cubic root of 40242113 is about 342.6838141673.

Adding to 40242113 its reverse (31124204), we get a palindrome (71366317).

The spelling of 40242113 in words is "forty million, two hundred forty-two thousand, one hundred thirteen".