40660121 has 2 divisors, whose sum is σ = 40660122. Its totient is φ = 40660120.

The previous prime is 40660111. The next prime is 40660129. The reversal of 40660121 is 12106604.

It is a happy number.

40660121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 1784896 = 6235^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 40660121 - 2¹⁰ = 40659097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40660093 and 40660102.

It is not a weakly prime, because it can be changed into another prime (40660129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20330060 + 20330061.

It is an arithmetic number, because the mean of its divisors is an integer number (20330061).

Almost surely, 2^40660121 is an apocalyptic number.

It is an amenable number.

40660121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40660121 is an equidigital number, since it uses as much as digits as its factorization.

40660121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40660121 is about 6376.5289146996. The cubic root of 40660121 is about 343.8662524268.

Adding to 40660121 its reverse (12106604), we get a palindrome (52766725).

The spelling of 40660121 in words is "forty million, six hundred sixty thousand, one hundred twenty-one".